+publisher:"Texas A&M University" +contributor:("Batteas, James D")

Texas A&M University

1. He, Xingliang. Synthesis, Characterization, Properties, and Tribological Performance of 2D Nanomaterials.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/152777

► Demand in wear and friction reduction drives continuous development of new lubricant additives for energy saving in wide engineering applications. In the present research, a… (more)

Subjects/Keywords: Lubricant additives; 2D nanomaterials; friction reduction; viscosity modification

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APA (6^th Edition):

He, X. (2014). Synthesis, Characterization, Properties, and Tribological Performance of 2D Nanomaterials. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152777

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

He, Xingliang. “Synthesis, Characterization, Properties, and Tribological Performance of 2D Nanomaterials.” 2014. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/152777.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

He, Xingliang. “Synthesis, Characterization, Properties, and Tribological Performance of 2D Nanomaterials.” 2014. Web. 17 Jul 2019.

Vancouver:

He X. Synthesis, Characterization, Properties, and Tribological Performance of 2D Nanomaterials. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/152777.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

He X. Synthesis, Characterization, Properties, and Tribological Performance of 2D Nanomaterials. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152777

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

2. Werke, Carrie Beth. Chemical and Physical Modification of Graphitic Materials by Oxidative Processes and Solvent Intercalation.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153850

► Graphene and graphite are materials of high interest for many applications. In order to increase the possible uses of these materials, more must be understood… (more)

▼ Graphene and graphite are materials of high interest for many applications. In order to increase the possible uses of these materials, more must be understood about how their properties can be modified. One way to modify graphitic properties is by chemical functionalization, such as oxidation. This work looks at two different oxidation techniques for graphite; UV/O3 exposure and biased AFM lithography for broad and local oxidation, respectively. For the supported graphitic samples including graphene, it is important to understand how sample preparation can lead to contamination in addition to investigating how to chemically and physically manipulate the graphitic properties. Three different mechanical exfoliation sample preparations were used to create samples, and each method was investigated with biased lithography. UV/O3 exposure is able to form graphite oxide with only the exposed area undergoing oxidation. It was found that the length of exposure time could be linearly correlated to the amount of defects as determined by Raman spectroscopy. Biased AFM lithography of graphite was also able to oxidize graphite, in a localized pattern instead of entire exposed area. By controlling the lithography conditions, the extent of oxidation in an area could be manipulated. Supported graphitic materials were created via Scotch tape, thermal release tape and water soluble tape. Each tape had unique sample preparation conditions, and each of the three samples yielded single to multilayer graphene surfaces which then underwent biased lithography. Biased lithography on each of these created surfaces demonstrated the impact that sample preparation had on device creation as the samples had unique responses based on which method was used. Scotch tape samples saw growths stemming from the graphitic areas that underwent the biased lithography, thermal release tape samples formed wrinkles in the graphitic region while donuts, on the edges, and the water soluble tape showed oxidation of the graphitic region as well as the formation of bubbles. These bubbles are believed to be due to the solvent intercalation which was able to undergo electrolysis, a novel method for graphitic bubble formation. Advisors/Committee Members: Batteas, James D (advisor), Russell, David H (committee member), Liang, Hong (committee member).

Subjects/Keywords: Graphitic Oxidation; Biased AFM Lithography; Graphitic Bubbles

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APA (6^th Edition):

Werke, C. B. (2014). Chemical and Physical Modification of Graphitic Materials by Oxidative Processes and Solvent Intercalation. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153850

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Werke, Carrie Beth. “Chemical and Physical Modification of Graphitic Materials by Oxidative Processes and Solvent Intercalation.” 2014. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/153850.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Werke, Carrie Beth. “Chemical and Physical Modification of Graphitic Materials by Oxidative Processes and Solvent Intercalation.” 2014. Web. 17 Jul 2019.

Vancouver:

Werke CB. Chemical and Physical Modification of Graphitic Materials by Oxidative Processes and Solvent Intercalation. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/153850.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Werke CB. Chemical and Physical Modification of Graphitic Materials by Oxidative Processes and Solvent Intercalation. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153850

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

3. Geng, Sheng. Investigation of Hypervelocity Massive Projectile- Graphene Interaction and Characterization of Individual Free-standing Nanoparticles in the Transmission Direction by Massive Cluster Secondary Ion Mass Spectrometry.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161315

► It has been shown that secondary ion emission from ultra-thin foils is notably enhanced in the transmission direction. This feature should be of interest for… (more)

▼ It has been shown that secondary ion emission from ultra-thin foils is notably enhanced in the transmission direction. This feature should be of interest for examining nano-objects. A pre-requisite is to deposit them on as thin a support as possible. For this study graphene was chosen. Free-standing graphene was bombarded alone and with deposition of dispersed nanoparticles in a setup enabling bombardment at 0? and secondary ion (SI) detection in transmission in-line with the incident projectiles. C¹,2+ 60 and Au⁴⁺ 400 at impact energies of ?0.4, 0.8 and 1.2 keV/atom respectively were used as primary ions. The experiments were run as a sequence of single projectile impacts with each time separate recording of the SIs identified via ToF-MS. In order to improve the understanding of the graphene as a potential quasi-immaterial substrate for the deposition of sub-monolayer nanoparticles, the 1-layer and 4-layer graphene were impacted by the individual 25 and 50 keV C¹,2+ 60 projectiles and negative SIs and secondary electrons (SEs) were collected in the transmission direction. The yields of C? n (n ? 4) are above 10% and decrease exponentially with n. The results are explained with the aid of molecular dynamics (MD) simulation. The ionization probability was estimated by comparing the SI yields of C? n to the yields of C 0 n from MD simulation. The ions come from the thermally excited rim of the impact hole damped by cluster fragmentation and electron detachment. The SE probability distributions are Poisson-like, and on average 3 thermal electrons are emitted per impact. The interaction of a 2D projectile on a 2D target is fundamentally different from that on a 3D material. 1-layer graphene was also impacted by the 440-540 keV Au4+ 400 projectiles in both positive and negative ion modes in the transmission direction. The projectiles penetrated the graphene and the Au? 1?3 fragment ions were observed as well as C? n. During the impact, ?15% of the initial kinetic energy is lost. The Au projectiles are neutralized when approaching the graphene, and then partially ionized again (positively and negatively) via electron tunneling from the hot rims of the impact hole on graphene. The projectiles obtain an internal energy of ?500 eV (?4900 K) after the impact. They undergo a ?90 step fragmentation with the ejection of Au1 atoms in the experimental time range of ?0.1 ?s. Individual free-standing 5 nm gold nanoparticles coated with dodecanethiol were deposited on graphene film and bombarded with Au⁴⁺ 400 and C¹,2+ 60 . The graphene substrate contributed few SIs beyond m/z 120, facilitating the detection of moieties attached to the nanoparticles. Compared to reflection SIMS, transmission SIMS shows a ?4 times higher effective yield of molecular ions from the dodecanethiol coating. The SI yields from Au⁴⁺ 400 impact are ?3 times higher than those from C²⁺ 60 impact. The yield of the dodecanethiol molecular ion is 1.0 ? 10^?4 from the Au⁴⁺ 400 bombardment and 3.0 ? 10^?5 from the C²⁺ 60 bombardment. In this case,… Advisors/Committee Members: Schweikert, Emile A (advisor), Russell, David H (committee member), Batteas, James D (committee member), Grunlan, Jaime C (committee member).

Subjects/Keywords: Secondary ion mass spectrometry; Gold nanoparticles; graphene; Projectile-2D material interaction

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APA (6^th Edition):

Geng, S. (2017). Investigation of Hypervelocity Massive Projectile- Graphene Interaction and Characterization of Individual Free-standing Nanoparticles in the Transmission Direction by Massive Cluster Secondary Ion Mass Spectrometry. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161315

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Geng, Sheng. “Investigation of Hypervelocity Massive Projectile- Graphene Interaction and Characterization of Individual Free-standing Nanoparticles in the Transmission Direction by Massive Cluster Secondary Ion Mass Spectrometry.” 2017. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/161315.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Geng, Sheng. “Investigation of Hypervelocity Massive Projectile- Graphene Interaction and Characterization of Individual Free-standing Nanoparticles in the Transmission Direction by Massive Cluster Secondary Ion Mass Spectrometry.” 2017. Web. 17 Jul 2019.

Vancouver:

Geng S. Investigation of Hypervelocity Massive Projectile- Graphene Interaction and Characterization of Individual Free-standing Nanoparticles in the Transmission Direction by Massive Cluster Secondary Ion Mass Spectrometry. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/161315.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Geng S. Investigation of Hypervelocity Massive Projectile- Graphene Interaction and Characterization of Individual Free-standing Nanoparticles in the Transmission Direction by Massive Cluster Secondary Ion Mass Spectrometry. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161315

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

4. Liao, Kang-Shyang. Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-3124

► Layer-by-layer (LbL) assembly based on ionic interactions has proven to be a versatile route for surface modification and construction of ultrathin nanocomposites. Covalent LbL assembly… (more)

▼ Layer-by-layer (LbL) assembly based on ionic interactions has proven to be a versatile route for surface modification and construction of ultrathin nanocomposites. Covalent LbL assembly based on facile ?click? covalent bond formation is an effective alternative, especially for the applications where a more robust ultrathin films or nanocomposites is desired. The subject of this dissertation focuses on the design of three different covalent LbL assemblies and their applications on conductive thin films, superhydrophobic surfaces, and solute responsive surfaces, respectively. Surface modification of PE substrates using covalent LbL assembly with PEI and Gantrez is a successful route to prepare a surface graft. The procedure is relative easy, fast and reproducible. Grafting multiple layers of PEI/Gantrez to the PE powder surface provided excellent coverage and promoted stable LbL film growth and excellent adhesion. This carbon black (CB) coated powder was compression molded into films, and their conductivity was measured, which revealed a percolation threshold below 0.01 wt % CB for the PEI-grafted system. Electrical conductivity of 0.2 S/cm was achieved with only 6 wt % CB, which is exceptional for a CB-filled PE film. Direct amination of MWNTs with PEI is a convenient and simple method leading to highly functionalized product that contains 6-8 % by weight PEI. Superhydrophobic PE films can be formed either from ionic LbL self-assembly of MWNT-NH-PEIs and poly(acrylic acid) or from covalent LbL self-assembly of MWNTNH- PEIs and Gantrez when the final graft is acrylated with octadecanoic acid. While the ionically assembled nanocomposite graft is labile under acid, the covalently assembled graft is more chemically robust. Responsive surfaces with significant, reversible, reproducible wettability changes can be prepared by covalent LbL grafting using PNIPAM-c-PNASI and aminated silica nanoparticles. A 65? ?? value was observed with water vs. 1.4 M Na2SO4. The prepared film shows a high surface roughness of ~300 nm, which contributes to the large solute responsive ?? values. The surfaces are reconfigurable in different solute conditions and that the changes in water contact angle are likely due to combination of change in surface roughness along with swell and intercalation of the solute ions into the PNIPAM surface. Advisors/Committee Members: Bergbreiter, David E. (advisor), Batteas, James D. (committee member), Grunlan, Jaime C. (committee member), Simanek, Eric E. (committee member).

Subjects/Keywords: SURFACE MODIFICATION; HYDROCARBON POLYMERS; COVALENT LAYER-BY-LAYER SELF-ASSEMBLY

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liao, K. (2009). Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-3124

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liao, Kang-Shyang. “Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly.” 2009. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-3124.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liao, Kang-Shyang. “Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly.” 2009. Web. 17 Jul 2019.

Vancouver:

Liao K. Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3124.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liao K. Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3124

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

5. Yang, Fan. Scanning tunneling microscopy studies on the structure and stability of model catalysts.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-3269

► An atomic level understanding of the structure and stability of model catalysts is essential for surface science studies in heterogeneous catalysis. Scanning tunneling microscopy (STM)… (more)

▼ An atomic level understanding of the structure and stability of model catalysts is essential for surface science studies in heterogeneous catalysis. Scanning tunneling microscopy (STM) can operate both in UHV and under realistic pressure conditions with a wide temperature span while providing atomic resolution images. Taking advantage of the ability of STM, our research focuses on 1) investigating the structure and stability of supported Au catalysts, especially under CO oxidation conditions, and 2) synthesizing and characterizing a series of alloy model catalysts for future model catalytic studies. In our study, Au clusters supported on TiO2(110) have been used to model supported Au catalysts. Our STM studies in UHV reveal surface structures of TiO2(110) and show undercoordinated Ti cations play a critical role in the nucleation and stabilization of Au clusters on TiO2(110). Exposing the TiO2(110) surface to water vapor causes the formation of surface hydroxyl groups and subsequently alters the growth kinetics of Au clusters on TiO2(110). STM studies on Au/TiO2(110) during CO oxidation demonstrate the real surface of a working catalyst. Au clusters supported on TiO2(110) sinter rapidly during CO oxidation, but are mostly stable in the single component reactant gas, either CO or O2. The sintering kinetics of supported Au clusters has been measured during CO oxidation and gives an activation energy, which supports the mechanism of CO oxidation induced sintering. CO oxidation was also found to accelerate the surface diffusion of Rh(110). Our results show a direct correlation between the reaction rate of CO oxidation and the diffusion rate of surface metal atoms. Synthesis of alloy model catalysts have also been attempted in our study with their structures successfully characterized. Planar Au-Pd alloy films has been prepared on a Rh(100) surface with surface Au and Pd atoms distinguished by STM. The growth of Au-Ag alloy clusters have been studied by in-situ STM on a cluster-to-cluster basis. Moreover, the atomic structure of a solution-prepared Ru3Sn3 cluster has been resolved on an ultra-thin silica film surface. The atomic structure and adsorption sites of the ultrathin silica film have also been well characterized in our study. Advisors/Committee Members: Goodman, D. Wayne (advisor), Agnolet, Glenn (committee member), Batteas, James D. (committee member), Lucchese, Robert R. (committee member).

Subjects/Keywords: STM; model catalysts; model alloy catalysts; structure; stability; Au; TiO2(110)

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APA (6^th Edition):

Yang, F. (2009). Scanning tunneling microscopy studies on the structure and stability of model catalysts. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-3269

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yang, Fan. “Scanning tunneling microscopy studies on the structure and stability of model catalysts.” 2009. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-3269.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yang, Fan. “Scanning tunneling microscopy studies on the structure and stability of model catalysts.” 2009. Web. 17 Jul 2019.

Vancouver:

Yang F. Scanning tunneling microscopy studies on the structure and stability of model catalysts. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3269.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yang F. Scanning tunneling microscopy studies on the structure and stability of model catalysts. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3269

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

6. Jung, Hyunsook. SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-499

► Ligand-receptor interactions are ubiquitous on cell membranes. Indeed, many important physiological functions primarily involve such interactions. These include cell signaling, pathogen binding, trafficking of lymphocytes,… (more)

▼ Ligand-receptor interactions are ubiquitous on cell membranes. Indeed, many important physiological functions primarily involve such interactions. These include cell signaling, pathogen binding, trafficking of lymphocytes, and the immune response.1-4 Therefore, studying ligand-receptor interactions at appropriate model membrane is of importance for both proper understanding of biological functions and applications to biosensors and bioseparations. Supported lipid bilayers are composed of the same lipid molecules found in the plasma cell membranes of living cells and possess the same two-dimensional fluidity as cell membranes, making them capable of mimicking the cell surface. Moreover, supported lipid bilayer-based in vitro assays are appealing because they require only very small sample volumes and they are suitable for multiplexing and high-throughput screening. Recently, our laboratory has combined supported lipid bilayer-coated microfluidic platforms with total internal reflection fluorescence microscopy to obtain equilibrium dissociation constant data for protein-ligand interactions. Using this method, it was found that equilibrium dissociation constants of antibody-ligand interactions at lipid membrane interfaces can be strongly affected by ligand lipophilicity and linker length/structure. These results are described in Chapter III. Monitoring protein-ligand interactions is routinely performed by fluorescently labeling the proteins of interest. Protein labeling can, however, interfere with detection measurements and be highly inconvenient to employ. To solve these problems, a simple and highly sensitive technique for detection of protein-ligand binding at biointerfaces has been developed. The method is based upon modulation of the interfacial pH when the protein binds. This change is detected by pH-sensitive fluorescent dye molecules embedded into the biointerface. The dye fluoresces strongly in the protonated state but becomes inactive upon deprotonation. These results are demonstrated in Chapter IV. Finally, the study of supported lipid bilayer-based electrophoresis is described in Chapter V. Bilayer electrophoresis is an attractive alternative to gel electrophoresis for the separation of membrane components such as lipids and membrane proteins because it is run in native-like environments and avoids exposing the analytes of interest to harsh chemicals. In this study, lipid rafts of varying size were used as separation matrices to separate two similar lipids with different alkyl chains. Lipid rafts of varying size were formed by a process controlled by varying treatment of the solid substrate. Depending on which method was employed, the results showed that lipid raft size could be modulated over five orders of magnitude. Moreover, it was found that the electrophoretic separation of the two lipid components depended on the size of rafts in the bilayer matrix. Advisors/Committee Members: Cremer, Paul S. (advisor), Reinhart, Gregory D. (committee member), Schweikert, Emile A. (committee member), Batteas, James D. (committee member).

Subjects/Keywords: supported lipid bilayer; ligand/receptor interactions

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jung, H. (2010). SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-499

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jung, Hyunsook. “SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES.” 2010. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-499.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jung, Hyunsook. “SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES.” 2010. Web. 17 Jul 2019.

Vancouver:

Jung H. SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-499.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jung H. SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-499

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

7. Liao, Wei-Ssu. NANOMATERIALS TO BIOSENSORS: A BENCH-TOP RAPID PROTOTYPING APPROACH.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-546

► Nanofabrication has received substantial interest from scientists and engineers because of its potential applications in many fields. This was because nanoscale structures have unique properties… (more)

▼ Nanofabrication has received substantial interest from scientists and engineers because of its potential applications in many fields. This was because nanoscale structures have unique properties that cannot be observed or utilized at other size scales. Our living environment and many of our daily necessities had been strongly influenced by these techniques. Computers, electronics, housewares, vehicles, and medical care are now all affected by this explosive nanotechnology. However, traditional methods in controlling nanoscale features and their properties were often time-consuming and expensive. The objective of my research was to design, fabricate, and test nanostructure platforms using a unique toolbox of bottom-up lithographic techniques recently developed in our laboratory. These novel methods can be utilized for the rapid prototyping of nanoscale patterns in a much easier and more economical way. Specifically, we also focused on applying these nanoscale patterns as sensor platforms. These platforms were easily produced with our unique methods, and provide ultra sensitive capability to detect diverse chemical or biological species. The demonstration of capabilities and applications of our unique technologies includes the following projects. Chapters II and III describe a simple, inexpensive, and rapid method for making metal nanoparticles ranging between 10 nm and 100 nm in size through metal photoreduction with templates. The process can be completed in approximately 11 minutes without the use of a clean room environment or vacuum techniques. A simple label-free biosensor fabrication method based on transmission localized surface plasmon resonance (T-LSPR) of this platform is also demonstrated. Chapters IV and V present a nanoscale patterning technique for creating diverse features in polymers and metals. The process works by combining evaporative ring staining with a colloidal templating process. Well-ordered hexagonally arrayed nanorings, double rings, triple rings, targets, and holes were all easily prepared. A line width as thin as ~15 nm can repeatably be performed with this technology. Finally, Chapter VI demonstrates an ultra-sensitive plasmonic optical device based on hexagonal periodic nanohole metal films produced through our evaporative templating technique. The optical properties of these sub-wavelength periodic hole array metal films are discussed. Advisors/Committee Members: Cremer, Paul S. (advisor), Goodman, D W. (committee member), Batteas, James D. (committee member), Teizer, Winfried (committee member).

Subjects/Keywords: Nanofabrication; Biosensor; Nanomaterial

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liao, W. (2010). NANOMATERIALS TO BIOSENSORS: A BENCH-TOP RAPID PROTOTYPING APPROACH. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-546

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liao, Wei-Ssu. “NANOMATERIALS TO BIOSENSORS: A BENCH-TOP RAPID PROTOTYPING APPROACH.” 2010. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-546.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liao, Wei-Ssu. “NANOMATERIALS TO BIOSENSORS: A BENCH-TOP RAPID PROTOTYPING APPROACH.” 2010. Web. 17 Jul 2019.

Vancouver:

Liao W. NANOMATERIALS TO BIOSENSORS: A BENCH-TOP RAPID PROTOTYPING APPROACH. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-546.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liao W. NANOMATERIALS TO BIOSENSORS: A BENCH-TOP RAPID PROTOTYPING APPROACH. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-546

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

8. Axnanda, Stephanus R. Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7353

► Fundamental studies of heterogeneous catalysis were performed and presented in this dissertation to gain a better understanding of heterogeneous catalytic reactions at a molecular level.… (more)

▼ Fundamental studies of heterogeneous catalysis were performed and presented in this dissertation to gain a better understanding of heterogeneous catalytic reactions at a molecular level. Surface science techniques were employed in achieving the goal. Low energy ion scattering spectroscopy (LEISS) is the main surface science technique which will be used in all the studies discussed throughout this dissertation. The main objectives of LEISS measurements are to: 1) obtain the information of surface composition of heterogeneous catalysts from the topmost layer; 2) observe the effects of reaction conditions on the surface composition of heterogeneous catalysts. The surface composition and morphology of Au-Pd clusters bimetallic model catalysts supported on SiO2 were characterized using LEISS, infrared reflection absorption spectroscopy (IRAS), and temperature programmed desorption (TPD). It is observed that relative to the bulk, the surface of the clusters is enriched in Au. Ethylene adsorption and dehydrogenation show a clear structure-reactivity correlation with respect to the structure/composition of these Au-Pd model catalysts. Fundamental studies of heterogeneous catalysis were performed and presented in this dissertation to gain a better understanding of heterogeneous catalytic reactions at a molecular level. Surface science techniques were employed in achieving the goal. Low energy ion scattering spectroscopy (LEISS) is the main surface science technique which will be used in all the studies discussed throughout this dissertation. The main objectives of LEISS measurements are to: 1) obtain the information of surface composition of heterogeneous catalysts from the topmost layer; 2) observe the effects of reaction conditions on the surface composition of heterogeneous catalysts. The surface composition and morphology of Au-Pd clusters bimetallic model catalysts supported on SiO2 were characterized using LEISS, infrared reflection absorption spectroscopy (IRAS), and temperature programmed desorption (TPD). It is observed that relative to the bulk, the surface of the clusters is enriched in Au. Ethylene adsorption and dehydrogenation show a clear structure-reactivity correlation with respect to the structure/composition of these Au-Pd model catalysts. Advisors/Committee Members: Goodman, David W. (advisor), Batteas, James D. (committee member), Darensbourg, Marcetta Y. (committee member), Shantz, Daniel F. (committee member).

Subjects/Keywords: Surface science; ISS; LEISS; Fuel Cell; Heterogeneous Catalysts

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APA (6^th Edition):

Axnanda, S. R. (2010). Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Axnanda, Stephanus R. “Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry.” 2010. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Axnanda, Stephanus R. “Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry.” 2010. Web. 17 Jul 2019.

Vancouver:

Axnanda SR. Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Axnanda SR. Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

9. Lundwall, Matthew James. Characterization and Reaction Studies of Silica Supported Platinum and Rhodium Model Catalysts.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8839

► The physical and catalytic properties of silica supported platinum or rhodium model catalysts are studied under both ultra high vacuum (UHV) and elevated pressure reaction… (more)

▼ The physical and catalytic properties of silica supported platinum or rhodium model catalysts are studied under both ultra high vacuum (UHV) and elevated pressure reaction conditions (>1torr). Platinum or rhodium nanoparticles are vapor deposited onto a SiO2/Mo(112) surface and characterized using various surface analytical methods. CO chemisorption is utilized as a surface probe to estimate the concentration of various sites on the nanoparticles through thermal desorption spectroscopy (TDS) and infrared reflection absorption spectroscopy (IRAS) along with microscopy techniques to estimate particle size. The results are compared with hard sphere models of face centered cubic metals described as truncated cubo-octahedron. Results demonstrate the excellent agreement between chemisorption and hard sphere models in estimating the concentration of undercoordinated atoms on the nanoparticle surface. Surfaces are then subjected to high pressure reaction conditions to test the efficacy of utilizing the rate of a chemical reaction to obtain structural information about the surface. The surfaces are translated in-situ to a high pressure reaction cell where both structure insensitive and sensitive reactions are performed. Structure insensitive reactions (e.g. CO oxidation) allow a method to calculate the total active area on a per atom basis for silica supported platinum and rhodium model catalysts under reaction conditions. While structure sensitive reactions allow an estimate of the types of reaction sites, such as step sites (?C7) under reaction conditions (e.g. n-heptane dehydrocyclization). High pressure structure sensitive reactions (e.g. ethylene hydroformylation) are also shown to drastically alter the morphology of the surface by dispersing nanoparticles leading to inhibition of catalytic pathways. Moreover, the relationships between high index single crystals, oxide supported nanoparticles, and high surface area technical catalysts are established. Overall, the results demonstrate the utility of model catalysts in understanding the structure-activity relationships in heterogeneous catalytic reactions and the usefulness of high pressure reactions as an analytical probe of surface morphology. Advisors/Committee Members: Goodman, D. Wayne (advisor), Batteas, James D. (committee member), Soriaga, Manuel P. (committee member), Shantz, Daniel F. (committee member).

Subjects/Keywords: Platinum; Rhodium; Model Catalysts; nanoparticles; ethylene; carbon monoxide; CO oxidation; hydroformylation; dehydrocyclization

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APA (6^th Edition):

Lundwall, M. J. (2012). Characterization and Reaction Studies of Silica Supported Platinum and Rhodium Model Catalysts. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8839

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lundwall, Matthew James. “Characterization and Reaction Studies of Silica Supported Platinum and Rhodium Model Catalysts.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8839.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lundwall, Matthew James. “Characterization and Reaction Studies of Silica Supported Platinum and Rhodium Model Catalysts.” 2012. Web. 17 Jul 2019.

Vancouver:

Lundwall MJ. Characterization and Reaction Studies of Silica Supported Platinum and Rhodium Model Catalysts. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8839.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lundwall MJ. Characterization and Reaction Studies of Silica Supported Platinum and Rhodium Model Catalysts. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8839

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

10. Cummins, Kyle. Interfacial Properties of Ultrathin- Film Metal Electrodes: Studies by Combined Electron Spectroscopy and Electrochemistry.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11199

► A pair of studies investigating the deposition and surface chemical properties of ultrathin metal films were pursued: (i) Pt-Co alloys on Mo(110); and (ii) Pd… (more)

▼ A pair of studies investigating the deposition and surface chemical properties of ultrathin metal films were pursued: (i) Pt-Co alloys on Mo(110); and (ii) Pd on Pt(111). Experimental measurement was based on a combination of electron spectroscopy (low energy ion scattering spectroscopy, X-ray photoelectron spectroscopy, Auger electron spectroscopy, and low energy electron diffraction) and electrochemistry (voltage efficiency, voltammetry, and coulometry). Mixed-metal preparation of Pt-Co films by thermal vapor deposition (TVD) resulted in a thin-film binary alloy. Careful analysis revealed a substantial divergence between the composition at the interface and that in the interior. This outcome was observed for all compositions and allowed for the construction of a ?surface phase diagram?. The proclivities of the alloys of pre-selected compositions towards enhanced catalysis of the oxygen-reduction reaction were assessed in terms of their voltage efficiencies, as manifested by the open-circuit potential (OCP) in O2-saturated dilute sulfuric acid electrolyte. The particular alloy surface, Pt3Co (XPt=3,XCo=1), whether from the thin film or a bulk single crystal, exhibited the highest OCP, a significant improvement over pure Pt but still appreciably lower than the thermodynamic limit. Under test conditions, the degradation of thusly-prepared films was primarily due to Co corrosion. Ultrathin Pd films on well-defined Pt(111) surfaces, with coverages from 0.5 to 8 monolayers (ML), were prepared by surface-limited redox replacement reaction (galvanic exchange) of underpotentially deposited Cu. Spectroscopic data revealed that films prepared in this manner are elementally pure, pseudomorphic to the substrate, and stable, independent of the surface coverage (?) of palladium. Analysis of the voltammetric profiles in the hydrogen evolution region revealed unique properties of hydrogen adsorption unseen in bulk electrodes. Notably, at 1 ML coverage, a step-free film was produced that did not exhibit hydrogen absorption. At higher coverages, digital (layer-by-layer) deposition gave way to 3D islands in a Stranski- Krastanov growth mode; under these conditions, onset of bulk-like behavior was observed. This method makes possible the synthesis of well-ordered noble-metal films in the absence of high-temperature treatment Advisors/Committee Members: Soriaga, Manuel P. (advisor), Vigh, Gyula (committee member), Batteas, James D. (committee member), Zhang, Xinghang (committee member).

Subjects/Keywords: UHV-EC; interfacial electrochemistry; platinum; cobalt; Pt-Co; thin films; alloys; Pt(111); ORR; UPD; galvanic displacement; SLR3; surface limited redox replacement reaction

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APA (6^th Edition):

Cummins, K. (2012). Interfacial Properties of Ultrathin- Film Metal Electrodes: Studies by Combined Electron Spectroscopy and Electrochemistry. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11199

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cummins, Kyle. “Interfacial Properties of Ultrathin- Film Metal Electrodes: Studies by Combined Electron Spectroscopy and Electrochemistry.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11199.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cummins, Kyle. “Interfacial Properties of Ultrathin- Film Metal Electrodes: Studies by Combined Electron Spectroscopy and Electrochemistry.” 2012. Web. 17 Jul 2019.

Vancouver:

Cummins K. Interfacial Properties of Ultrathin- Film Metal Electrodes: Studies by Combined Electron Spectroscopy and Electrochemistry. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11199.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cummins K. Interfacial Properties of Ultrathin- Film Metal Electrodes: Studies by Combined Electron Spectroscopy and Electrochemistry. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11199

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

11. Zhou, Zihao. Scanning Tunneling Microscopy Studies of Metal Clusters Supported on Graphene and Silica Thin Film.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11409

► The understanding of nucleation and growth of metals on a planar support at the atomic level is critical for both surface science research and heterogeneous… (more)

▼ The understanding of nucleation and growth of metals on a planar support at the atomic level is critical for both surface science research and heterogeneous catalysis studies. In this dissertation, two planar substrates, including graphene and ultra-thin silica film were employed for supported model catalysts studies. The structure and stability of several catalytically important metals supported on these two substrates were thoroughly investigated using scanning tunneling microscopy (STM) coupled with other traditional surface science techniques. In the study of the graphene/Ru(0001) system, the key factors that govern the growth and distribution of metals on the graphene have been studied based on different behaviors of five transition metals, namely Pt, Rh, Pd, Co, and Au supported on the template of a graphene moire pattern formed on Ru(0001). Both metal-carbon (M-C) bond strength and metal cohesive energies play significant roles in the cluster formation process and the M-C bond strength is the most important factor that affects the morphology of clusters at the initial stages of growth. Interestingly, Au exhibits two-dimensional (2-D) structures that span several moire unit cells. Preliminary data obtained by dosing molecular oxygen onto CO pre-covered Au islands suggest that the 2-D Au islands catalyze the oxidation of CO. Moreover, graphene/Ru(0001) system was modified by introducing transition metals, oxygen or carbon at the interface between the graphene and Ru(0001). Our STM results reveal that the geometric and/or electronic structure of graphene can be adjusted correspondingly. In the study of the silica thin film system, the structure of silica was carefully investigated and our STM images favor for the [SiO4] cluster model rather than the network structure. The nucleation and adsorption of three metals, namely Rh, Pt and Pd show that the bond strength between the metal atom and Si is the key factor that determines the nucleation sites at the initial stages of metal deposition. The annealing effect studies reveal that Rh and Pt atoms diffuse beneath the silica film and form the 2-D islands that are covered with a silica thin film. In contrast, the formation of Pd silicide was observed upon annealing to high temperatures. Advisors/Committee Members: Goodman, David W. (advisor), Batteas, James D. (advisor), Agnolet, Glenn (committee member), Lucchese, Robert R. (committee member).

Subjects/Keywords: STM; Graphene; Silica Film; Metal Clusters; Au

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APA (6^th Edition):

Zhou, Z. (2012). Scanning Tunneling Microscopy Studies of Metal Clusters Supported on Graphene and Silica Thin Film. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11409

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhou, Zihao. “Scanning Tunneling Microscopy Studies of Metal Clusters Supported on Graphene and Silica Thin Film.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11409.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhou, Zihao. “Scanning Tunneling Microscopy Studies of Metal Clusters Supported on Graphene and Silica Thin Film.” 2012. Web. 17 Jul 2019.

Vancouver:

Zhou Z. Scanning Tunneling Microscopy Studies of Metal Clusters Supported on Graphene and Silica Thin Film. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11409.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhou Z. Scanning Tunneling Microscopy Studies of Metal Clusters Supported on Graphene and Silica Thin Film. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11409

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

12. Liu, Chunming. Protein Separation and Label-Free Detection on Supported Lipid Bilayers.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11754

► Membrane-bound proteins and charged lipids are separated based on their charge-to-size ratio by electrophoretic-electroosmotic focusing (EEF) method on supported lipid bilayers (SLBs). EEF uses opposing… (more)

▼ Membrane-bound proteins and charged lipids are separated based on their charge-to-size ratio by electrophoretic-electroosmotic focusing (EEF) method on supported lipid bilayers (SLBs). EEF uses opposing electrophoretic and electroosmotic forces to focus and separate proteins and lipids into narrow bands from an initially homogeneous mixture. Membrane-associated species were focused into specific positions within the SLB in a highly repeatable fashion. The steady-state focusing positions of the proteins could be predicted and controlled by tuning experimental conditions, such as buffer pH, ionic strength, electric field and temperature. Careful tuning of the variables should enable one to separate mixtures of membrane proteins with only subtle differences. The EEF technique was found to be an effective way to separate protein mixtures with low initial concentrations and it overcame diffusive peak broadening problem. A "SLB differentiation" post-separation SLB treatment method was also developed by using magnetic particles to rapidly slice the whole SLB into many small patches after electrophoretic separation, while keeping the majority of materials on surface and avoiding the use of chemical reactions. Label-free detection techniques were also developed based on EEF on SLBs. First, a new separation based label-free detection method was developed based on the change of focusing position of fluorescently labeled ligands. This technique is capable of simultaneous detecting multiple protein competitive binding on the same ligand on SLBs. Low concentration protein can be detected in the presence of interfering proteins and high concentration of BSA. The fluorescent ligands were moved to different focusing positions in a charged SLB patch by different binding proteins. Both free ligand and protein bound ligand concentrations were obtained. Therefore, both protein identity and quantity information were obtained simultaneously. Second, the focusing position of fluorescent biomarkers on SLB was used to monitor the phospholipase D catalyzed hydrolysis of phosphatidylcholine (PC) to form phosphatidic acid (PA), which is involved with the change of charge on the phospholipids. The focusing position of fluorescent membrane-bound biomarker in the EEF experiment is directly determined by the negative charge density on SLB. Other enzyme reactions involved with the change of phospholipids charge can be monitored in a label-free fashion in a similar way. Advisors/Committee Members: Cremer, Paul S. (advisor), Batteas, James D. (committee member), Hilty, Christian (committee member), Musser, Siegfried M. (committee member).

Subjects/Keywords: Supported Lipid Bilayer; Electrophoretic-Electroosmotic Focusing; Protein Separation; Label-Free Detection

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APA (6^th Edition):

Liu, C. (2012). Protein Separation and Label-Free Detection on Supported Lipid Bilayers. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11754

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liu, Chunming. “Protein Separation and Label-Free Detection on Supported Lipid Bilayers.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11754.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liu, Chunming. “Protein Separation and Label-Free Detection on Supported Lipid Bilayers.” 2012. Web. 17 Jul 2019.

Vancouver:

Liu C. Protein Separation and Label-Free Detection on Supported Lipid Bilayers. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11754.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liu C. Protein Separation and Label-Free Detection on Supported Lipid Bilayers. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11754

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

13. Cable, Robert E. Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2026

► As devices and new technologies continue to shrink, nanocrystalline multi-metal compounds are becoming increasingly important for high efficiency and multifunctionality. However, synthetic methods to make… (more)

▼ As devices and new technologies continue to shrink, nanocrystalline multi-metal compounds are becoming increasingly important for high efficiency and multifunctionality. However, synthetic methods to make desirable nanocrystalline multi-metallics are not yet matured. In response to this deficiency, we have developed several solution-based methods to synthesize nanocrystalline binary alloy and intermetallic compounds. This dissertation describes the processes we have developed, as well as our investigations into the use of lithographically patterned surfaces for template-directed self-assembly of solution dispersible colloids. We used a modified polyol process to synthesize nanocrystalline intermetallics of late transition and main-group metals in the M-Sn, Pt-M?, and Co-Sb systems. These compounds are known to have interesting physical properties and as nanocrystalline materials they may be useful for magnetic, thermoelectric, and catalytic applications. While the polyol method is quite general, it is limited to metals that are somewhat easy to reduce. Accordingly, we focused our synthetic efforts on intermetallics comprised of highly electropositive metals. We find that we can react single-metal nanoparticles with zero-valent organometallic Zinc reagents in hot, coordinating amine solvents via a thermal decomposition process to form several intermetallics in the M??-Zn system. Characterization of the single-metal intermediates and final intermetallic products shows a general retention of morphology throughout the reaction, and changes in optical properties are also observed. Following this principle of conversion chemistry, we can employ the high reactivity of nanocrystals to reversibly convert between intermetallic phases within the Pt-Sn system, where PtSn2 ? PtSn ? Pt3Sn. Our conversion chemistry occurs in solution at temperatures below 300 ?C and within 1 hour, highlighting the high reactivity of our nanocrystalline materials compared to the bulk. Some evidence of the generality for this process is also presented. Our nanocrystalline powders are dispersible in solution, and as such are amenable to solution-based processing techniques developed for colloidal dispersions. Accordingly, we have investigated the use of lithographically patterned surfaces to control the self-assembly of colloidal particles. We find that we can rapidly crystallize 2-dimensional building blocks, as well as use epitaxial templates to direct the formation of interesting superlattice structures comprised of a bidisperse population of particles. Advisors/Committee Members: Batteas, James D. (advisor), Schaak, Raymond E. (advisor), Dunbar, Kim R. (committee member), Shantz, Daniel F. (committee member).

Subjects/Keywords: Chemistry; Inorganic; Nanocrystal; Nanoparticle; Synthesis; Polyol; Metallurgy; Intermetallic; Alloy; Catalysis; Colloidal Crystal; Lithography; Surface Patterning; Template

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APA (6^th Edition):

Cable, R. E. (2009). Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cable, Robert E. “Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.” 2009. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cable, Robert E. “Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.” 2009. Web. 17 Jul 2019.

Vancouver:

Cable RE. Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cable RE. Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

14. Chang, Chi-Yuan 1980-. Electrical and Optical Characterization of Nanoscale Materials for Electronics.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/148119

► Due to a lack of fundamental knowledge about the role of molecular structures in molecular electronic devices, this research is focused on the development of… (more)

▼ Due to a lack of fundamental knowledge about the role of molecular structures in molecular electronic devices, this research is focused on the development of instruments to understand the relation between device design and the electronic properties of electroactive components. The overall goal is to apply this insight to obtain a more efficient and reliable scheme and greater functional control over each component. This work developed a fabrication method for porphyrinoids on graphene-based field effect transistors (FETs), and a chemical sensing platform under an ambient environment by integrating a tip-enhanced Raman spectroscope (TERS), atomic force microscope (AFM), and electronic testing circuit. The study is divided into three aspects. The first is aimed at demonstrating fabrication processes of nanoscale FETs of graphene and porphyrinoid composites based entirely on scanning probe lithography (SPL). A nanoshaving mechanism was used to define patterns on octadecanethiol self-assembled monolayers on gold film evaporated on graphene flakes, followed by metal wet etching and/or oxygen plasma etching to develop patterns on Au films and graphene, respectively. The integrity and optoelectronic properties were examined to validate the processes. The second area of study focused on the development of the chemical sensing platform, enabling chemical changes to be monitored during charge transports under an ambient environment. The localized Raman enhancement was induced by exciting surface plasmon resonance in nanoscale silver enhancing probes made by thermal silver evaporation on sharp AFM tips. As the system was designed along an off-axis illumination/collection scheme, it was demonstrated that it was capable of observing molecular decomposition on opaque and conductive substrates induced by an electric bias. The third line of work proposed a novel TERS system and a probe preparation method. Silver nanowires mounted on AFM tips were used to locally enhance the Raman scattering. The observed Raman enhancement allows quick chemical analysis from a nanoscale region, and thus enables chemical mapping beyond the diffraction limit. Compared with other TERS geometries, the new optical design not only allows analysis on large or opaque samples, but also simplifies the design of the optical components and the alignment processes of the setup. Advisors/Committee Members: Batteas, James D (advisor), Son, Dong Hee (committee member), Liang, Hong (committee member), Cremer, Paul S (committee member).

Subjects/Keywords: Nanowire; Nanolithography; FET; TERS; Tip-enhanced Raman; Graphene

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APA (6^th Edition):

Chang, C. 1. (2012). Electrical and Optical Characterization of Nanoscale Materials for Electronics. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148119

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chang, Chi-Yuan 1980-. “Electrical and Optical Characterization of Nanoscale Materials for Electronics.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/148119.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chang, Chi-Yuan 1980-. “Electrical and Optical Characterization of Nanoscale Materials for Electronics.” 2012. Web. 17 Jul 2019.

Vancouver:

Chang C1. Electrical and Optical Characterization of Nanoscale Materials for Electronics. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/148119.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chang C1. Electrical and Optical Characterization of Nanoscale Materials for Electronics. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148119

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

15. Javier, Alnald Caintic. Integrating Experiment and Theory in Electrochemical Surface Science: Studies on the Molecular Adsorption on Noble-Metal Electrode Surfaces by Density Functional Theory, Electron Spectroscopy, and Electrochemistry.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151363

► Computational techniques based on density functional theory (DFT) and experimental methods based on electrochemistry (EC), electrochemical scanning tunneling microscopy (EC-STM), and high-resolution electron energy loss… (more)

▼ Computational techniques based on density functional theory (DFT) and experimental methods based on electrochemistry (EC), electrochemical scanning tunneling microscopy (EC-STM), and high-resolution electron energy loss spectroscopy (HREELS) were employed to study the adsorption of (i) sulfuric acid on Pd(111), (ii) benzene on Pd(111), (iii) hydroquinone/benzoquinone on Pd(111), (iv) hydroquinone sulfonate/benzoquinone sulfonate on Pd(111), (v) 2,3-dimethylhydroquinone/2,3-dimethylbenzoquinone on Pd(111) and polycrystalline Pd, (vi) hydrogen on 1-6 monolayers (ML) of Pd deposited on a Pt(111) substrate, and (vii) a thiolated iron hydrogenase model complex on polycrystalline Au. In situ EC-STM and DFT investigations of sulfuric acid on a Pd(111) surface indicated that two layers of water molecules and hydronium ions are assembled, non-co-planar with one another, between the rows of surface-coordinated sulfate anions; the layer that is slightly elevated is composed of hydronium counter cations. The STM images of benzene chemisorbed on a Pd(111) electrode surface were simulated and the results suggested that, when the potential of the Pd electrode is held at 0.3 V, benzene is chemisorbed on a 3-fold site; while at 0.55 V, the molecule is adsorbed on a position between a 3-fold and a 2-fold site. Computational and experimental results implied that at low concentrations, hydroquinone sulfonate undergoes oxidative chemisorption forming benzoquinone sulfonate (BQS) on the Pd(111) surface, BQS adopts a flat orientation in which the quinone ring is centered over a 2-fold site, and the C?H and C?S bonds are no longer co-planar with the quinone ring and are slightly tilted, directed away from the surface. At very dilute concentrations, when hydroquinone (H_(2)Q) undergoes oxidative chemisorption producing benzoquinone oriented flat, albeit with a slight tilt, on the Pd(111) surface, the flat-adsorbed quinone ring is centered on a bridge site where the C_(2) axis is rotated 30degree from the [110] direction of the metal substrate, the p-oxygen atoms are located above two-fold sites, and the ring is slightly puckered with the C?H bonds tilted away from the surface at approximately 20degree. When 2,3-dimethylH_(2)Q is chemisorbed on the Pd surface, at low concentrations, 2,3-dimethylH_(2)Q is oxidatively chemisorbed producing 2,3-dimethyl-1,4-benzoquinone oriented flat on the surface, the flat-adsorbed rings are centered above 2-fold sites wherein the C=O bonds are pointing 30degree from the [110] direction of the substrate, the para-oxygen atoms are located above bridge sites, the peripheral bonds are tilted away from the surface at ca. 20degree, and at higher concentrations, oxidative chemisorption occurs through activation of the ring?s C?H bonds yielding edge-oriented 2,3-dimethylH_(2)Q. Electrochemistry and DFT results also implied that at 1-2 ML of Pd on Pt(111), hydrogen is only adsorbed on a hollow site while at 3 ML of Pd or more, atomic hydrogen may be chemisorbed on the 3-fold site or absorbed in the… Advisors/Committee Members: Soriaga, Manuel P (advisor), Balbuena, Perla B (advisor), Batteas, James D (committee member), Capareda, Sergio (committee member), Vigh, Gyula (committee member).

Subjects/Keywords: Electrochemical surface science; Adsorption; Surfaces; Density Functional Theory; Electron Spectroscopy; Electrochemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Javier, A. C. (2013). Integrating Experiment and Theory in Electrochemical Surface Science: Studies on the Molecular Adsorption on Noble-Metal Electrode Surfaces by Density Functional Theory, Electron Spectroscopy, and Electrochemistry. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151363

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Javier, Alnald Caintic. “Integrating Experiment and Theory in Electrochemical Surface Science: Studies on the Molecular Adsorption on Noble-Metal Electrode Surfaces by Density Functional Theory, Electron Spectroscopy, and Electrochemistry.” 2013. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/151363.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Javier, Alnald Caintic. “Integrating Experiment and Theory in Electrochemical Surface Science: Studies on the Molecular Adsorption on Noble-Metal Electrode Surfaces by Density Functional Theory, Electron Spectroscopy, and Electrochemistry.” 2013. Web. 17 Jul 2019.

Vancouver:

Javier AC. Integrating Experiment and Theory in Electrochemical Surface Science: Studies on the Molecular Adsorption on Noble-Metal Electrode Surfaces by Density Functional Theory, Electron Spectroscopy, and Electrochemistry. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/151363.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Javier AC. Integrating Experiment and Theory in Electrochemical Surface Science: Studies on the Molecular Adsorption on Noble-Metal Electrode Surfaces by Density Functional Theory, Electron Spectroscopy, and Electrochemistry. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151363

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

16. Silveira, Joshua A. Development of Ion Mobility-mass Spectrometry Instrumentation to Probe the Conformations and Capture the Solution to Gas Phase Transition of Electrosprayed Biomolecules.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151729

► Recent progress has been made developing ion mobility-mass spectrometry (IM-MS) instruments for biophysical studies; however, experimental techniques that can probe the structure and/or dynamics of… (more)

▼ Recent progress has been made developing ion mobility-mass spectrometry (IM-MS) instruments for biophysical studies; however, experimental techniques that can probe the structure and/or dynamics of biomolecules at intermediate extents of hydration are limited and little is known about the final stages of desolvation during electrospray ionization (ESI). Here, ion optical devices, analytical methodology, and instrument platforms are developed to study the conformations of structurally labile biomolecules (i.e., peptides and proteins) produced upon ESI and provide new insight into their solution to gas phase evolution. First, fundamental principles of periodic focusing ion mobility spectrometry are comprehensively discussed. Radial ion confinement is attributed to a collisionally dampened effective potential that ultimately results in high ion transmission. Detailed equations of motion are derived that culminate into useful methodology for accurate determination of peptide and protein collision cross section values via inclusion of a mobility dampening coefficient. Second, evaporation of water from extensively hydrated protons and peptides formed by ESI is examined for the first time using a new cryogenic (80 K) IM-MS instrument platform. Key parameters that influence the cluster distributions are critically examined. In agreement with previous studies, the findings indicate that water evaporation is largely dependent upon the particular charge-carrying species within the cluster. IM-MS results for protonated water clusters suggest that the special stability of the well-known H^(+)(H_(2)O)_(n) (n = 21) ?magic number? cluster is attributed to the presence of a compact clathrate cage isomer produced upon ESI. Peptide studies are also presented in which specific and nonspecific solvation is observed for gramicidin S [GS + 2H]^(2+) (H_(2)O)_(n) (n = 0 to 26) and bradykinin [BK + 2H]^(2+) (H_(2)O)_(n) (n = 0 to 73), respectively. However in the case of substance P, [SP + 3H]^(3+), the results demonstrate that a compact dehydrated conformer population (resulting from the evaporative ESI process) can be kinetically trapped on the time scale of several milliseconds, even when an extended coil conformation is energetically favorable in the gas phase. Advisors/Committee Members: Russell, David H (advisor), Batteas, James D (committee member), Schweikert, Emile A (committee member), Musser, Siegfried M (committee member).

Subjects/Keywords: mass spectrometry; ion mobility spectrometry; periodic focusing ion guide; gas phase hydration

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Silveira, J. A. (2013). Development of Ion Mobility-mass Spectrometry Instrumentation to Probe the Conformations and Capture the Solution to Gas Phase Transition of Electrosprayed Biomolecules. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151729

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Silveira, Joshua A. “Development of Ion Mobility-mass Spectrometry Instrumentation to Probe the Conformations and Capture the Solution to Gas Phase Transition of Electrosprayed Biomolecules.” 2013. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/151729.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Silveira, Joshua A. “Development of Ion Mobility-mass Spectrometry Instrumentation to Probe the Conformations and Capture the Solution to Gas Phase Transition of Electrosprayed Biomolecules.” 2013. Web. 17 Jul 2019.

Vancouver:

Silveira JA. Development of Ion Mobility-mass Spectrometry Instrumentation to Probe the Conformations and Capture the Solution to Gas Phase Transition of Electrosprayed Biomolecules. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/151729.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silveira JA. Development of Ion Mobility-mass Spectrometry Instrumentation to Probe the Conformations and Capture the Solution to Gas Phase Transition of Electrosprayed Biomolecules. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151729

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

17. Pravitasari, Arika. Tuning the Optical Properties of Nanoscale Materials on Surfaces Through Controlled Exchange Reactions on Cadmium Selenide Quantum Dots and Patterning of Gold and QD Nanoparticle Arrays.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151756

► This work focused on the integration of CdSe quantum dots (QDs) and Au nanoparticles (NPs) as building blocks for the development of quantum dot and… (more)

▼ This work focused on the integration of CdSe quantum dots (QDs) and Au nanoparticles (NPs) as building blocks for the development of quantum dot and plasmonic based optical and sensing devices. The manipulation of nanomaterials was performed to tune their surface and optical properties to study their fundamental chemical and physical processes as well as their applications. First, the cation exchange reactions between CdSe QDs and Ag+ cations were explored as the surface properties of the QDs were altered. The surface properties of CdSe QDs were tuned by local exposure of laser through photopatterning. The CdSe QDs with different surface properties altered by photopatterning were then exposed to a solution of increasing Ag+ concentrations. The decrease in the photoluminescence intensity of CdSe QDs were monitored and used as an indication for the cation exchange reactions taking place. Photoluminescence data confirmed that the cation exchange reactions exhibited different efficiencies for QDs that were photo-altered in comparison to pristine QDs. The second area of the study employed the use of directed assembly to fabricate pattern arrays of Au NPs. Fabrication of metallic nanostructure arrays using polystyrene (PS) microspheres often required the use of photo-resist, chemical etching and metal evaporation processes, here they were use to direct the assembly of colloidal Au nanoparticles (NPs) by simple evaporative processes. This created an inexpensive and simple bench-top method for bottom-up fabrication of metallic nanostructure arrays. Optimum parameter for the formation of uniform Au nanoring arrays was achieved by controlling the relative humidity (RH) and the relative concentration of Au NPs to PS microspheres. The fabricated Au nanostructure arrays serve as great platforms not only for future applications in plasmonic based sensing and optical devices but also for the fundamental studies of their localized surface plasmon resonance (LSPR). An alternative method of patterning, a combination between the use of a self-assembled monolayer (SAM) molecular linker and PS mask fabricated via polydimethylsiloxane (PDMS) micro-stamp was also discussed briefly. Particle lithography is a versatile method and can be used to fabricate pattern array of different nanomaterials with similar surface affinities. It was then modified to reduce the non-specific binding of CdSe QDs forming uniform nanoring arrays. The photoluminescence of the fabricated CdSe nanoring arrays was then altered to locally tune their surface and optical properties. This allowed for the post-fabrication surface modification of each nanoring for the creation of CdSe nanoring arrays of different surface and optical properties. Advisors/Committee Members: Batteas, James D (advisor), Son, Dong Hee (committee member), Schweikert, Emile A (committee member), Grunlan, Jaime (committee member).

Subjects/Keywords: CdSe quantum dots; cation exchange; Au nanoparticle arrays; particle lithography

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APA (6^th Edition):

Pravitasari, A. (2013). Tuning the Optical Properties of Nanoscale Materials on Surfaces Through Controlled Exchange Reactions on Cadmium Selenide Quantum Dots and Patterning of Gold and QD Nanoparticle Arrays. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151756

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pravitasari, Arika. “Tuning the Optical Properties of Nanoscale Materials on Surfaces Through Controlled Exchange Reactions on Cadmium Selenide Quantum Dots and Patterning of Gold and QD Nanoparticle Arrays.” 2013. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/151756.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pravitasari, Arika. “Tuning the Optical Properties of Nanoscale Materials on Surfaces Through Controlled Exchange Reactions on Cadmium Selenide Quantum Dots and Patterning of Gold and QD Nanoparticle Arrays.” 2013. Web. 17 Jul 2019.

Vancouver:

Pravitasari A. Tuning the Optical Properties of Nanoscale Materials on Surfaces Through Controlled Exchange Reactions on Cadmium Selenide Quantum Dots and Patterning of Gold and QD Nanoparticle Arrays. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/151756.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pravitasari A. Tuning the Optical Properties of Nanoscale Materials on Surfaces Through Controlled Exchange Reactions on Cadmium Selenide Quantum Dots and Patterning of Gold and QD Nanoparticle Arrays. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151756

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

18. Gamez, Roberto. Development of and Application of Plasmonic Nanomaterials for Mass Spectrometry Based Biosensing.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/152818

► The use of nanomaterials for sensing and biological applications has recently gained interest owing to the unique physical, chemical and optical properties that arise when… (more)

▼ The use of nanomaterials for sensing and biological applications has recently gained interest owing to the unique physical, chemical and optical properties that arise when materials are reduced to the nanoscale. The unique optical properties exhibited by gold (Au) and silver (Ag) nanomaterials have made for versatile platforms in a wide range of applications including surface plasmon biosensing techniques and laser desorption/ionization mass spectrometry (LDI-MS). A primary driver for this work is the relative ease performing surface modifications to nanoparticles (NPs), which can be used to enhance the selectivity of ionization and/or facilitate analyte capture. The research presented here focuses on the development of AuNP and AgNP based biosensors for selective capture and ionization of low abundance compounds from complex mixtures and subsequent detection by LDI-MS and Matrix Assisted Laser Desorption Ionization- Mass Spectrometry (MALDI-MS). First, a ?strategy? for selective capture and ionization of specific compound classes based on chemical derivatization of gold nanorods (AuNRs) and infrared laser desorption ionization (IR-LDI) is described. LDI is performed at near infrared wavelengths (1064 nm) that overlap with the longitudinal surface plasmon resonance (LSPR) mode of AuNRs which allows absorbed energy from the laser to facilitate the desorption and ionization of the analyte. Capture of hydrophobic species using surfactant coated AuNRs and subsequent detection by IR-LDI-MS was also demonstrated in these experiments. Second, the fabrication of a label-free MS and optical detection based biosensor platform consisting of a phospholipid layer partially tethered to the surface of a gold nanorod for the detection of low abundance lipophilic analytes from complex mixtures is described. In these experiments, stable phospholipid capped AuNRs are produced by tethering some of the phospholipids to the surface of the AuNRs though a covalent, gold-thiol linkage. The effectiveness of the biosensor is demonstrated for the label-free detection of a membrane active lipophilic drug from aqueous solution and of a lipopeptide from fetal bovine serum. Lastly, porous AgNP embedded thin films were fabricated by the sol-gel method and utilized as matrix-free LDI-MS biosensors applicable to several chemical classes. In these experiments, UV laser irradiation (337 nm) of the AgNP facilitates desorption and ionization of a number of peptides, triglycerides, and phospholipids. Preferential ionization of sterols from vesicles composed of olefinic phosphosphatidylcholines is also demonstrated. Advisors/Committee Members: Russell, David H (advisor), Batteas, James D (committee member), Schweikert, Emile A (committee member), Pellois, Jean-Phillipe (committee member).

Subjects/Keywords: Mass Spectrometry; Gold Nanorods; Gold Nanoparticles; Sol-Gel; Silver Nanoparticles

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gamez, R. (2014). Development of and Application of Plasmonic Nanomaterials for Mass Spectrometry Based Biosensing. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152818

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gamez, Roberto. “Development of and Application of Plasmonic Nanomaterials for Mass Spectrometry Based Biosensing.” 2014. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/152818.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gamez, Roberto. “Development of and Application of Plasmonic Nanomaterials for Mass Spectrometry Based Biosensing.” 2014. Web. 17 Jul 2019.

Vancouver:

Gamez R. Development of and Application of Plasmonic Nanomaterials for Mass Spectrometry Based Biosensing. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/152818.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gamez R. Development of and Application of Plasmonic Nanomaterials for Mass Spectrometry Based Biosensing. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152818

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

19. Ewers, Bradley William. Geometric Nanoconfinement Effects on the Electronic and Mechanical Properties of Self-Assembled Molecular Systems.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153823

► With the ongoing research and development of nanoscale technologies and materials, it becomes increasingly important to understand how local environment influences molecular and material properties.… (more)

▼ With the ongoing research and development of nanoscale technologies and materials, it becomes increasingly important to understand how local environment influences molecular and material properties. An important factor in this regard is geometric nanoconfinement, for example, the restriction of molecules to nanostructure surfaces. The bulk or average characteristics of materials and molecules do not appropriately define their behavior in these circumstances, and highly localized measurement techniques developed to specifically identify the influence of confinement on their properties is essential to understanding their characteristics and behavior. In this dissertation, two forms of geometric confinement are considered in the context of different molecular properties. First, the role of radial confinement on the tribological properties of self-assembled monolayers (SAMs) is considered. SAMs are an excellent model lubricant for experimental studies of boundary lubrication, and they have been employed as boundary lubricant additives and surface coatings. The lubricated contacts of technologically relevant surfaces, however, consist of asperity interactions, and the summit curvature of these asperities can impact the critical cohesive forces from which the properties of the SAM are derived. Molecular dynamics simulation was employed to understand the influence of nanoscopic surface curvature, as well as surface coverage density, two factors which together contribute to the cohesive forces of SAMs, on their tribological properties. In particular their dissipative potential and effective surface protection were examined, as well as the influence of these factors on the contact mechanics of functionalized nanoasperity contacts. Another mode of geometric confinement studiedin this work is two-dimensional nanoconfinement of molecules and its influence on the mechanism of charge transport in molecular systems. Effective control of charge transport in molecules is essential for molecular modification of CMOS technologies, and is critical in controlling charge carrier dynamics in dye-sensitized photovoltaics. In this work, the size dependence of the electronic properties of thiol-tethered zinc porphyrin aggregateson the Au(111) surface was investigated. AFM nanolithography was used to confine these molecules within an alkanethiol matrix on the Au(111) surface, forming molecular islands of specific dimensions to investigate the relationship between island size and charge transport, demonstrating a shift from tunneling based charge transport to the more tunable and efficient charge hopping based transport. Advisors/Committee Members: Batteas, James D (advisor), Wooley, Karen L (committee member), Wheeler, Steven E (committee member), Polycarpou, Andreas A (committee member).

Subjects/Keywords: tribology; charge transport; porphyrin; molecular dynamics; scanning tunneling microscopy; atomic force microscopy; nanolithography

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ewers, B. W. (2014). Geometric Nanoconfinement Effects on the Electronic and Mechanical Properties of Self-Assembled Molecular Systems. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153823

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ewers, Bradley William. “Geometric Nanoconfinement Effects on the Electronic and Mechanical Properties of Self-Assembled Molecular Systems.” 2014. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/153823.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ewers, Bradley William. “Geometric Nanoconfinement Effects on the Electronic and Mechanical Properties of Self-Assembled Molecular Systems.” 2014. Web. 17 Jul 2019.

Vancouver:

Ewers BW. Geometric Nanoconfinement Effects on the Electronic and Mechanical Properties of Self-Assembled Molecular Systems. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/153823.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ewers BW. Geometric Nanoconfinement Effects on the Electronic and Mechanical Properties of Self-Assembled Molecular Systems. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153823

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

20. Alvarez Ortiz, Johannes Orlando. Wettability Alteration Using Surfactants to Improve Oil Recovery from Unconventional Liquid Reservoirs.

Degree: PhD, Petroleum Engineering, 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/165825

► Improving oil recovery from unconventional liquid reservoirs (ULR) is a major challenge, and knowledge of recovery mechanisms and interaction of completion fluid additives with the… (more)

▼ Improving oil recovery from unconventional liquid reservoirs (ULR) is a major challenge, and knowledge of recovery mechanisms and interaction of completion fluid additives with the rock is fundamental in tackling the problem. Fracture treatment performance and consequently oil recovery could be improved by adding surfactants to stimulation fluids to promote imbibition by wettability alteration and interfacial tension (IFT) reduction. The Young-Laplace equation relates the capillary pressure to IFT and contact angle. Thus, it follows that capillarity is significant in nanopores associated with ULR and complex as the contact angle (CA) and IFT varies simultaneously. This study analyzes the potential of improving oil recovery by imbibition using different groups of surfactants as additives to completion fluids by characterizing their interaction with oil and heterogeneous siliceous and carbonate ULR samples from the Wolfcamp, Eagle Ford, Bakken and Barnet formations as well as the effect of wettability modification and IFT reduction in maximizing well performance after stimulation. A correlated set of experiments were proposed beginning by characterizing ULR rocks and fluids and evaluating original wettability by measuring CA and zeta-potential. Then, different types of surfactants were evaluated to gauge their effectiveness in altering wettability and IFT. In addition, adsorption measurements were performed to calculate the amount of surfactant adsorbed into the rock. Moreover, spontaneous imbibition experiments were carried out in conjunction with CT scan technology to measure oil recovery, fluid penetration (imbibition) and change of fluid saturation in the rock samples with time. Then, a core-flooding system was designed to be combined with the CT scanner to experimentally simulate the fracture-treatment and to represent surfactant imbibition in an ULR core fracture during a soaking and flowback production scheme. The results showed that surfactant solutions are capable of altering ULR wettability to water-wet with moderate reduction of IFT. However, the extent of wettability alteration strongly depends on rock lithology, surfactant and oil type. Surfactant adsorption measurements also showed the dependence of rock lithology on surfactant performance. Moreover, spontaneous imbibition and core-flooding experiments suggested that wettability alteration and IFT reduction are beneficial to oil recovery as evidenced by the improved oil recovery when surfactants were used. These findings were consistent with CA, zeta potential, surfactant adsorption and IFT measurements. Next, to scale our laboratory results, imbibition rates and dimensionless time scaling curves were generated corroborating that fracture density and rock-fluid interactions are key parameters for oil recovery. From the results obtained, it can be concluded that moderate IFT reduction in addition to significant wettability alteration has optimum effect on improving oil recovery from these ULR. These findings provide insight in designing completion… Advisors/Committee Members: Schechter, David S (advisor), Barrufet, Maria A (committee member), Akkutlu, Ibrahim Y (committee member), Batteas, James D (committee member).

Subjects/Keywords: Wettability; Unconventional Liquid Reservoirs; Surfactants; Imbibition; Shale; Wolfcamp; Eagle Ford; Bakken; Barnett

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alvarez Ortiz, J. O. (2017). Wettability Alteration Using Surfactants to Improve Oil Recovery from Unconventional Liquid Reservoirs. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/165825

Chicago Manual of Style (16^th Edition):

Alvarez Ortiz, Johannes Orlando. “Wettability Alteration Using Surfactants to Improve Oil Recovery from Unconventional Liquid Reservoirs.” 2017. Doctoral Dissertation, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/165825.

MLA Handbook (7^th Edition):

Alvarez Ortiz, Johannes Orlando. “Wettability Alteration Using Surfactants to Improve Oil Recovery from Unconventional Liquid Reservoirs.” 2017. Web. 17 Jul 2019.

Vancouver:

Alvarez Ortiz JO. Wettability Alteration Using Surfactants to Improve Oil Recovery from Unconventional Liquid Reservoirs. [Internet] [Doctoral dissertation]. Texas A&M University; 2017. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/165825.

Council of Science Editors:

Alvarez Ortiz JO. Wettability Alteration Using Surfactants to Improve Oil Recovery from Unconventional Liquid Reservoirs. [Doctoral Dissertation]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/165825

Texas A&M University

21. Pawlicki, Alison Andrea. Charge Transport and Directed Assembly of Nano-confined Porphyrin Molecules on Surfaces: Towards Molecular and Organic Electronics.

Degree: PhD, Materials Science and Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158965

► Presently, the aim of molecular/organic electronics is to incorporate organic materials into conventional silicon-based devices and complimentary metal-oxide semiconductor (CMOS) technology to expand the functionality… (more)

▼ Presently, the aim of molecular/organic electronics is to incorporate organic materials into conventional silicon-based devices and complimentary metal-oxide semiconductor (CMOS) technology to expand the functionality of electronic devices, exploit bottom-up fabrication techniques, and to achieve nanoscopic dimensions. However, the success of molecular/organic electronics depends upon tailoring the function of devices by intentionally modifying the properties of the molecular components starting at the single molecule level and continuing to fabricate meaningful molecular structures. Here, porphyrins were used as a platform to study the structure/electronic property relationship because they are candidates for molecule-containing devices and have vast chemical tunability. The structure of these porphyrins consists of a macrocycle attached to an alkanethiol tether that bonds to Au surfaces and were assembled within a dodecanethiol (C12) self-assembled monolayer (SAM). The physical morphology of the mixed SAM was examined and manipulated by Atomic Force Microscopy (AFM). The molecular-level morphology and the electronic properties were examined by Scanning Tunneling Microscopy (STM). The porphyrin chemical structure was systematically perturbed and allowed to randomly self-assemble within a C12 SAM. Contrary to original expectations of molecular/organic electronics, chemical structure perturbations did not lead to variations in the electronic properties for single porphyrin molecules with consistent indications of tunneling dominated by the alkanethiol tether. To recover the ability to tune the electronic properties, assemblies large enough to stabilize charge were formed with indications of Coulomb Blockade. However, increasing variations in the relative conductance were observed for increasing assembly size. To interrogate this, the electronic properties were examined as a function of assembly duration and a stark difference in the current-voltage (I-V) characteristics attributed to subtle changes in nearest neighbor interactions. To utilize the electronic properties of porphyrins found here in a pre-defined manner, a facile two-step method was developed to direct porphyrin assembly. First, the surface tether, pentanedithiol (C5DT), was controllably attached to the Au(111) surface in pre-defined geometries. Second, porphyrins were selectively attached to the C5DT by “click” chemistry. Employing this method, porphyrins built-up into a pi-stacked hierarchy on the C5DT domains and displayed the desired I-V characteristics. Advisors/Committee Members: Batteas, James D (advisor), Seminario, Jorge M (committee member), Vaddiraju, Sreeram (committee member), Lucchese, Robert R (committee member).

Subjects/Keywords: organic electronics; molecular electronics; surface science; nanotechnology; charge transport; scanning tunneling microscopy; atomic force microscopy; porphyrin; self-assembly; directed assembly; self assembled monolayer; nanografting; scanning tunneling spectroscopy; current-voltage; tunneling; charge hopping; tunneling decay constant; tunneling efficiency; alkanethiol

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pawlicki, A. A. (2016). Charge Transport and Directed Assembly of Nano-confined Porphyrin Molecules on Surfaces: Towards Molecular and Organic Electronics. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158965

Chicago Manual of Style (16^th Edition):

Pawlicki, Alison Andrea. “Charge Transport and Directed Assembly of Nano-confined Porphyrin Molecules on Surfaces: Towards Molecular and Organic Electronics.” 2016. Doctoral Dissertation, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/158965.

MLA Handbook (7^th Edition):

Pawlicki, Alison Andrea. “Charge Transport and Directed Assembly of Nano-confined Porphyrin Molecules on Surfaces: Towards Molecular and Organic Electronics.” 2016. Web. 17 Jul 2019.

Vancouver:

Pawlicki AA. Charge Transport and Directed Assembly of Nano-confined Porphyrin Molecules on Surfaces: Towards Molecular and Organic Electronics. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/158965.

Council of Science Editors:

Pawlicki AA. Charge Transport and Directed Assembly of Nano-confined Porphyrin Molecules on Surfaces: Towards Molecular and Organic Electronics. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158965

Texas A&M University

22. Zigmond, Jennifer Summerhill. Development and Testing of Intricate, Amphiphilic Crosslinked Hyperbranched Fluoropolymers with Integrated Liquid Crystalline Properties as Anti-Icing Coatings in Aerospace and Defense Applications.

Degree: PhD, Chemistry, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158935

► Atmospheric icing, the process by which supercooled water droplets freeze upon contact with a surface, has proven to be devasting when not controlled or prevented.… (more)

▼ Atmospheric icing, the process by which supercooled water droplets freeze upon contact with a surface, has proven to be devasting when not controlled or prevented. Currently, the solution for addressing this problem is the use of deicing fluids, which are toxic and inefficient, leading to the development of intrinsically anti-icing materials to focus on prevention rather than response after manifestation. Amphiphilic polymer coatings have been of particular interest as they are capable of presenting complex nano- and microscopic heterogeneities for inhibition of ice formation, which is not a typical approach toward anti-icing technologies. We have previously synthesized crosslinked networks comprised of hyperbranched fluoropolymers (HBFP) and poly(ethylene glycol) (PEG), which demonstrated superb anti-biofouling capabilities credited to their amphiphilic morphology, nanoscopic surface topography and dynamic surface reorganization. Through the tuning of the amphiphilicity and thermo-responsive molecular ordering of this crosslinked hyperbranched network, we expand the application of these materials by exploiting their characteristics for development of robust, dynamic, anti-icing coatings for aerospace applications. An array of films was synthesized by varying the PEG crosslinker to study the effect of hydrophilic:hydrophobic component ratios on the thermal, mechanical and surface properties. Differential scanning calorimetry (DSC) data show significant reductions in the water melting transition temperatures (-5 ⁰C and -27 ⁰C for free and bound water, respectively). The novel application of this system displays the expansion and diversity of a well-established coating that demonstrates unique water confinement and sequestration behaviors with the ability to reorganize at the surface. Due to its great potential as an anti-icing coating, additional investigations and chemical manipulation of the binary system led to the integration of a thermally-dynamic molecule, a liquid crystalline (LC) moiety. A library of LC systems was developed in order to probe the effects that size, mesophase and topology would have on the water depression efficiency of these materials. An LC monomer was incorporated into the polymer during polymerization in order to enhance the dynamic reorganization of the system during changes in temperature and wetting. The results suggest that the unique LC-HBFP system is a viable option as a dynamic coating for extreme environments. Advisors/Committee Members: Wooley, Karen L (advisor), Batteas, James D (committee member), Wheeler, Steven E (committee member), Liang, Hong (committee member).

Subjects/Keywords: anti-icing; amphiphilic; liquid crystalline; dynamic; coatings

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zigmond, J. S. (2016). Development and Testing of Intricate, Amphiphilic Crosslinked Hyperbranched Fluoropolymers with Integrated Liquid Crystalline Properties as Anti-Icing Coatings in Aerospace and Defense Applications. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158935

Chicago Manual of Style (16^th Edition):

Zigmond, Jennifer Summerhill. “Development and Testing of Intricate, Amphiphilic Crosslinked Hyperbranched Fluoropolymers with Integrated Liquid Crystalline Properties as Anti-Icing Coatings in Aerospace and Defense Applications.” 2016. Doctoral Dissertation, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/158935.

MLA Handbook (7^th Edition):

Zigmond, Jennifer Summerhill. “Development and Testing of Intricate, Amphiphilic Crosslinked Hyperbranched Fluoropolymers with Integrated Liquid Crystalline Properties as Anti-Icing Coatings in Aerospace and Defense Applications.” 2016. Web. 17 Jul 2019.

Vancouver:

Zigmond JS. Development and Testing of Intricate, Amphiphilic Crosslinked Hyperbranched Fluoropolymers with Integrated Liquid Crystalline Properties as Anti-Icing Coatings in Aerospace and Defense Applications. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/158935.

Council of Science Editors:

Zigmond JS. Development and Testing of Intricate, Amphiphilic Crosslinked Hyperbranched Fluoropolymers with Integrated Liquid Crystalline Properties as Anti-Icing Coatings in Aerospace and Defense Applications. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158935

Texas A&M University

23. Spear, Jessica. Understanding and Controlling the Tribological Properties of Graphene on Rough Surfaces.

Degree: 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/156401

► Understanding and controlling friction, adhesion and wear is critical for the continued growth and utilization of emerging nanotechnologies such as micro- and nano-electromechanical systems devices… (more)

▼ Understanding and controlling friction, adhesion and wear is critical for the continued growth and utilization of emerging nanotechnologies such as micro- and nano-electromechanical systems devices (NEMS/MEMS). The challenge of operating NEMS/MEMS with contacting interfaces stems from the large surface-to-volume ratio of these devices where surface forces dominate the interfacial interactions. Capillary forces, even in low humidity, can increase adhesion causing high friction and sticking as well as catalyzing wear on the surface. In addition, the nanoscale roughness of surfaces leads to high pressures and shear forces at asperity-asperity contacts, ultimately leading to device failure. To mitigate friction and wear of silicon surfaces, two-dimensional solid state lubricants such as graphene have drawn increased interest due to the rapid development of fabrication techniques. One of the newest carbon nanomaterials, graphene is a single atomic layer of highly ordered pyrolytic graphite. Studies over the past decade on graphene have elucidated a variety of unique properties such as large out-of-plane flexibility, strong in-plane modulus and chemical inertness which have made it an ideal candidate for use as a protective surface coating. Although graphene can easily adopt a similar morphology to its underlying substrate, the properties of graphene are largely influenced by its environmental and substrate interactions. To better understand and address the challenges of graphene?s substrate mediated properties for applications to NEMS/MEMS, this dissertation includes research on the fundamental interactions between graphene and rough substrates. Using Atomic Force Microscopy, the morphology of graphene on rough surfaces was shown to partially conform to the substrate roughness as a result of the size and spacing of the nanoparticle asperities and a balance between the interfacial adhesion and strain in the graphene lattice. This type of morphology decreases the contact between graphene and the substrate resulting in a weakly bound state that is undesirable for use as a protective coating. However, exploring the mechanical properties showed that under increased loading the conformity could be controllably increased and the frictional properties showed a dependence on the asperity-asperity contact area unique to these types of rough substrate geometries. Based on these results, further research was explored to control the tribological properties of graphene by systematically changing the nanoscale roughness and surface chemistry to increase graphene adhesion to the substrate for better friction modification. Advisors/Committee Members: Batteas, James D (advisor), Son, Dong H (committee member), Grunla, Jaime C (committee member), Schweikert, Emile A (committee member).

Subjects/Keywords: Graphene; Friction; AFM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Spear, J. (2015). Understanding and Controlling the Tribological Properties of Graphene on Rough Surfaces. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156401

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Spear, Jessica. “Understanding and Controlling the Tribological Properties of Graphene on Rough Surfaces.” 2015. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/156401.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Spear, Jessica. “Understanding and Controlling the Tribological Properties of Graphene on Rough Surfaces.” 2015. Web. 17 Jul 2019.

Vancouver:

Spear J. Understanding and Controlling the Tribological Properties of Graphene on Rough Surfaces. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/156401.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Spear J. Understanding and Controlling the Tribological Properties of Graphene on Rough Surfaces. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/156401

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

24. Link, Lauren A. Degradable Polycarbonate Networks Derived from Quinic Acid and Designed for Biomedical Applications.

Degree: 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/156419

► The pursuit of polymers with natural and renewable precursors is driven by two specific aims: (i) to develop sustainable and biodegradable plastics which decrease dependence… (more)

▼ The pursuit of polymers with natural and renewable precursors is driven by two specific aims: (i) to develop sustainable and biodegradable plastics which decrease dependence on petroleum feedstocks and address problems associated with plastic waste and pollution, and (ii) to design novel biomaterials with built-in biocompatibility and the ability to degrade under physiological conditions to produce resorbable natural byproducts. Herein, a new family of nontoxic bio-based polycarbonate networks that exhibit a wide range of achievable thermomechanical properties and have the potential to breakdown hydrolytically into biologically-beneficial and environmentally-benign degradation products is described. The natural product quinic acid, known for its antioxidant and growth-promoting properties, was selected as the monomeric building block, and hydrolytically labile carbonates were selected as the linkages. Solvent-free thiol-ene chemistry was utilized in the copolymerization of tris(alloc) quinic acid and a variety of multifunctional thiol monomers to obtain poly(thioether-co-carbonate) networks. Natural multifunctional thiols derived from lipoic acid, a metabolic antioxidant, were explored to further increase the overall natural content of the material. A wide range of tunable thermomechanical properties including glass transition temperatures from ?18 to 65 ?C and mechanical characteristics from a rubbery elastomer to a rigid plastic was achieved by careful selection of thiol monomers. Special attention was paid to the characterization of structure-thermomechanical property relationships and how these relationships change under physiological conditions. The short-term mechanical changes triggered by solvent plasticization in a physiologically-relevant environment (PBS, pH 7.4, 37 ?C) were observed by submersion dynamic mechanical analysis. The long-term degradation kinetics, including swelling and mass loss, were monitored, and the results showed a range of degradation times from 5 to ~35 weeks based on the crosslink density and hydrophilicity of the polymer network. In vitro cytotoxicity and cell attachment studies were performed, and X-ray imaging contrast properties were observed to investigate the feasibility of the poly(thioether-co-carbonate) networks to serve as platform materials in biomedical applications, specifically as orthopedic implant devices. Overall, by using simple fabrication techniques and reliable chemistry, the poly(thioether-co-carbonate) networks developed in this work represent a versatile and nontoxic family of materials which may be used for to a wide variety of applications. Advisors/Committee Members: Wooley, Karen L (advisor), Grunlan, Melissa A (committee member), Maitland, Duncan J (committee member), Batteas, James D (committee member).

Subjects/Keywords: polycarbonates; thiol-ene; crosslinked networks; degradable; quinic acid

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Link, L. A. (2015). Degradable Polycarbonate Networks Derived from Quinic Acid and Designed for Biomedical Applications. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156419

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Link, Lauren A. “Degradable Polycarbonate Networks Derived from Quinic Acid and Designed for Biomedical Applications.” 2015. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/156419.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Link, Lauren A. “Degradable Polycarbonate Networks Derived from Quinic Acid and Designed for Biomedical Applications.” 2015. Web. 17 Jul 2019.

Vancouver:

Link LA. Degradable Polycarbonate Networks Derived from Quinic Acid and Designed for Biomedical Applications. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/156419.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Link LA. Degradable Polycarbonate Networks Derived from Quinic Acid and Designed for Biomedical Applications. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/156419

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

25. Nagaraja, Ashvin T. Nanomaterial Modification for Bioconjugation and Enhanced Stability Towards Optical Sensor Development.

Degree: 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/156490

► The evolving field of nanomaterial synthesis needs adaptable techniques for the modification and construction of multifunctional components. In this work, a unique layer-by-layer (LbL) method… (more)

▼ The evolving field of nanomaterial synthesis needs adaptable techniques for the modification and construction of multifunctional components. In this work, a unique layer-by-layer (LbL) method is demonstrated as a generic pathway for nanomaterial stabilization and bioconjugation, facilitating manipulation and handling for new applications. In particular, nanomaterials have unique optical properties that can potentially improve the sensitivity and long-term performance in applications such as optical biosensors, particularly those based on energy transfer. However, the reproducible integration of nanomaterials into stable assays remains a significant challenge. Therefore, the generalized LbL technique was specifically applied towards the fabrication of a novel nanomaterial-enabled optical sensor. The broader implications of this LbL technique on nanoparticles were explored by characterizing the capabilities and performance of multiple nanoscale core materials and prospective polymer coatings. The modified nanomaterials were characterized for their colloidal and optical stability under varying pH, buffer, and ionic strength conditions. A single bilayer coating of weak and weak-strong polymers using the developed procedure was capable of imparting colloidal stability with a minimal hydrodynamic size increase; an essential feature for energy transfer sensors. The application of this LbL coating was demonstrated for the construction of a nanomaterial-enabled energy transfer sensor utilizing concanavalin A (ConA)-coated gold nanorods (energy acceptors) combined with fluorescent gold nanoclusters (NCs) grown within ovalbumin (OVA) (energy donors). The successful construction of the sensor components was verified and the concept demonstrated via reversible quenching in the presence of increasing glucose concentrations. Calcium carbonate was explored as a porous template for the encapsulation of affinity sensing chemistry. The entire process was studied; synthesis of the carbonate template, capsule formation via LbL, and dissolution of carbonate to form a hollow capsule, along with the incorporation of assay components using co-precipitation. The knowledge gained provides fundamental insight for improving the function of sensor schemes utilizing carbonate and to guide future considerations for encapsulation. These results demonstrate significant advances for the reliable fabrication of nanomaterial-enabled optical sensors. The fundamental knowledge and experimental expertise developed shall guide the rational design of future sensor iterations for improved performance. Advisors/Committee Members: McShane, Michael J (advisor), Meissner, Kenith E (committee member), Batteas, James D (committee member), Applegate, Brian E (committee member).

Subjects/Keywords: nanomaterial; sensor; polymer; polyelectrolyte; colloid; bioconjugation; hydrodynamic size; nanoparticle; quantum dot; gold; energy transfer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nagaraja, A. T. (2015). Nanomaterial Modification for Bioconjugation and Enhanced Stability Towards Optical Sensor Development. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156490

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nagaraja, Ashvin T. “Nanomaterial Modification for Bioconjugation and Enhanced Stability Towards Optical Sensor Development.” 2015. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/156490.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nagaraja, Ashvin T. “Nanomaterial Modification for Bioconjugation and Enhanced Stability Towards Optical Sensor Development.” 2015. Web. 17 Jul 2019.

Vancouver:

Nagaraja AT. Nanomaterial Modification for Bioconjugation and Enhanced Stability Towards Optical Sensor Development. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/156490.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nagaraja AT. Nanomaterial Modification for Bioconjugation and Enhanced Stability Towards Optical Sensor Development. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/156490

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

26. Seetho, Kellie. Developing New Methodologies for Anti-Fouling Polymeric Network Syntheses, Orthogonal Modifications, and Applications in Marine Environment.

Degree: PhD, Chemistry, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/174228

► Biofouling on ship hulls and other surfaces calls for immediate attention as fouling organisms increase both friction and weight of vessels, resulting in wasted fuel… (more)

▼ Biofouling on ship hulls and other surfaces calls for immediate attention as fouling organisms increase both friction and weight of vessels, resulting in wasted fuel consumption, travel time, and cleaning resources. There are currently many efforts to develop polymeric networks as anti-fouling coatings to replace traditional anti-fouling paints, which contain toxic compounds. This dissertation focuses on the development of new methodologies for anti-fouling polymeric network syntheses, orthogonal modifications, characterization and anti-fouling properties for marine anti-fouling applications. A terpolymer network based on hyperbranched fluoropolymers crosslinked with poly(ethylene glycol) and polydimethylsiloxane that displayed improved fouling releasing properties was generated. Methodologies and experiments were designed and performed to investigate the stability and crosslinking efficiency of the network when the crosslinking polymers were increased. The concept of using a three-component system was retained while changing each component. A ternary network of silsesquioxanes, an amphiphilic fluorinated compound and sulfobetaines was generated by thiol-ene click chemistry and to form coatings. The anti-fouling performances of the coatings were then tested against various marine fouling organisms. A facile, two-step modification to generate an amphiphilic zwitterionic copolymer from a commodity copolymer was also explored. A copolymer containing hydrophobic units and reactive units was synthesized and subsequently modified to produce an amphiphilic, zwitterionic polymer. The amphiphilic zwitterionic polymer was covalently attached onto silanized glass with different crosslinking extents to form amphiphilic crosslinked networks. The surface properties of the resultant polymer coating can be easily tuned by varying the extent of cross-linking in the network. Anti-fouling studies of bovine serum albumin and Ulva zoospores suggest that this system displayed potential as an anti-fouling material. Lastly, the thermal and mechanical properties of zwitterionic vs. blended ionic polymers were investigated. Different charged polymers were prepared by functionalizing poly[(allyl glycidyl ether)-b-(ethylene oxide)-b-(allyl glycidyl ether)] (P(AGE-b-EO-b-AGE)) with different charged thiols through highly efficient photoinitiated thiol-ene chemistry. Equimolar amounts of polymers with positive charged side chains and negative charged side chains were then mixed together and compared to polymers with zwitterionic side chains that possess similar charge densities. The bulk polymers were characterized by thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical thermal analysis to study the effect of the nature of ionic interactions of the charged polymers. Advisors/Committee Members: Wooley, Karen L (advisor), Bergbreiter, David E (committee member), Batteas, James D (committee member), Grunlan, Melissa A (committee member).

Subjects/Keywords: anti-fouling; polymer

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Seetho, K. (2016). Developing New Methodologies for Anti-Fouling Polymeric Network Syntheses, Orthogonal Modifications, and Applications in Marine Environment. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174228

Chicago Manual of Style (16^th Edition):

Seetho, Kellie. “Developing New Methodologies for Anti-Fouling Polymeric Network Syntheses, Orthogonal Modifications, and Applications in Marine Environment.” 2016. Doctoral Dissertation, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/174228.

MLA Handbook (7^th Edition):

Seetho, Kellie. “Developing New Methodologies for Anti-Fouling Polymeric Network Syntheses, Orthogonal Modifications, and Applications in Marine Environment.” 2016. Web. 17 Jul 2019.

Vancouver:

Seetho K. Developing New Methodologies for Anti-Fouling Polymeric Network Syntheses, Orthogonal Modifications, and Applications in Marine Environment. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/174228.

Council of Science Editors:

Seetho K. Developing New Methodologies for Anti-Fouling Polymeric Network Syntheses, Orthogonal Modifications, and Applications in Marine Environment. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/174228

27. Bellido Sosa, Edson. Computational Study of the Development of Graphene Based Devices.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10396

► Graphene is a promising material for many technological applications. To realize these applications, new fabrication techniques that allow precise control of the physical properties, as… (more)

▼ Graphene is a promising material for many technological applications. To realize these applications, new fabrication techniques that allow precise control of the physical properties, as well as large scale integration between single devices are needed. In this work, a series of studies are performed in order to develop graphene based devices. First, using MD simulations we study the effects of irradiating graphene with a carbon ion atom at several positions and energies from 0.1 eV to 100 keV. The simulations show four types of processes adsorption, reflection, transmission, and vacancy formation. At energies below 10 eV the dominant process is reflection, between 10 and 100 eV is adsorption, and between 100 eV and 100 keV the dominant process is transmission. Vacancy formation is a low rate process that takes place at energies above 30 eV. Three types of defects were found: adatom, single vacancy, and 5-8-5 defect formed from a double vacancy defect. Also a bottom-up fabrication method is studied, in this method, the controlled folding of graphene structures, driven by molecular interactions with water nanodroplets, is analyzed considering the interactions with substrates such as SiO2, HMDS and IPA on SiO2. When the graphene is supported on SiO2, the attraction between graphene and the substrate prevents graphene from folding but if the substrate has HMDS or IPA, the interaction between graphene and the substrate is weak, and depending on the geometry of the graphene structure, folding is possible. Finally, to evaluate the characteristics of graphene based devices, we model the vibrational bending modes of graphene ribbons with different dimensions. The resonant frequencies of the ribbons and relations between the size of the ribbon and their resonant frequencies are calculated. The interaction of a graphene vibronic device with water and IPA molecules are simulated and demonstrate that this device can be used as a sensitive vibronic molecular sensor that is able to distinguish the chemical nature of the detected molecule. Also, the electrical properties of the graphene vibronic with armchair and zigzag border are calculated; the latter has the potential to generate THz electrical signals as demonstrated in this work. Advisors/Committee Members: Seminario, Jorge M. (advisor), Balbuena, Perla B. (committee member), Batteas, James D. (committee member).

Subjects/Keywords: graphene; THz; vibronics; electronics; folding; ion bombardment; lithography; sensor; TeraHertz; defects; devices

10 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bellido Sosa, E. (2012). Computational Study of the Development of Graphene Based Devices. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10396

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bellido Sosa, Edson. “Computational Study of the Development of Graphene Based Devices.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10396.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bellido Sosa, Edson. “Computational Study of the Development of Graphene Based Devices.” 2012. Web. 17 Jul 2019.

Vancouver:

Bellido Sosa E. Computational Study of the Development of Graphene Based Devices. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10396.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bellido Sosa E. Computational Study of the Development of Graphene Based Devices. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10396

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

28. Li, Yu-Chin. Environmentally Benign Flame Retardant Nanocoatings for Fabric.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9203

► A variety of materials were used to fabricate nanocoatings using layer-by-layer (LbL) assembly to reduce the flammability of cotton fabric. The most effective brominated flame… (more)

▼ A variety of materials were used to fabricate nanocoatings using layer-by-layer (LbL) assembly to reduce the flammability of cotton fabric. The most effective brominated flame retardants have raised concerns related to their toxicity and environmental impact, which has created a need for alternative flame retardant chemistries and approaches. Polymer nanocomposites typically exhibit reduced mass loss and heat release rates, along with anti-dripping behavior, all of which are believed to be due to the formation of a barrier surface layer. Despite these benefits, the viscosity and modulus of the final polymeric material is often altered, making industrial processing difficult. These challenges inspired the use of LbL assembly to create densely layered nanocomposites in an effort to produce more flame-retardant coatings. Laponite and montmorillonite (MMT) clay were paired with branched poly(ethylenimine) to create thin film assemblies that can be tailored by changing pH and concentration of aqueous deposition mixtures. Both films can be grown linearly as a function of layers deposited, and they contained at least 70 wt percent of clay. When applying these films to cotton fabric, the individual fibers are uniformly coated and the fabric has significant char left after burning. MMT-coated fabric exhibits reduced total heat release, suggesting a protective ceramic surface layer is created. Small molecule, POSS-based LbL thin films were also successfully deposited on cotton fabric. With less than 8 wt percent added to the total fabric weight, more than 12 wt percent char remained after microscale combustion calorimetry. Furthermore, afterglow time was reduced and the fabric weave structure and shape of the individual fibers were highly preserved following vertical flame testing. A silica-like sheath was formed after burning that protected the fibers. Finally, the first intumescent LbL assembly was deposited on cotton fabric. SEM images show significant bubble formation on fibers, coated with a 0.5 wt percent PAAm/1 wt percent PSP coating after burning. In several instances, a direct flame on the fabric was extinguished. The peak HRR and THR of coated fabric has 30 percent and 65 percent reduction, respectively, compared to the uncoated control fabric. These anti-flammable nanocoatings provide a relatively environmentally-friendly alternative for protecting fabrics, such as cotton, and lay the groundwork for rendering many other complex substrates (e.g., foam) flame-retardant without altering their processing and desirable mechanical behavior. Advisors/Committee Members: Grunlan, Jaime C. (advisor), Batteas, James D. (committee member), Radovic, Miladin (committee member), Ugaz, Victor M. (committee member).

Subjects/Keywords: Layer-by-Layer; flame retardant; nanocoatings; fabric

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APA (6^th Edition):

Li, Y. (2012). Environmentally Benign Flame Retardant Nanocoatings for Fabric. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9203

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Li, Yu-Chin. “Environmentally Benign Flame Retardant Nanocoatings for Fabric.” 2012. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9203.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Li, Yu-Chin. “Environmentally Benign Flame Retardant Nanocoatings for Fabric.” 2012. Web. 17 Jul 2019.

Vancouver:

Li Y. Environmentally Benign Flame Retardant Nanocoatings for Fabric. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9203.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Li Y. Environmentally Benign Flame Retardant Nanocoatings for Fabric. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9203

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

29. Chen, Jixin. Nanofabrication, Plasmon Enhanced Fluorescence and Photo-oxidation Kinetics of CdSe Nanoparticles.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7771

► Unconventional nanofabrication techniques; both those which have been newly developed and those under development, had brought inexpensive, facile, yet high quality means to fabricate nanostructures… (more)

▼ Unconventional nanofabrication techniques; both those which have been newly developed and those under development, had brought inexpensive, facile, yet high quality means to fabricate nanostructures that have feature sizes of less than 100 nm in industry and academia. This dissertation focuses on developing unconventional fabrication techniques, building studying platforms, and studying the mechanisms behind them. The studies are divided into two main facets and four chapters. The first facet, in Chapter II and Chapter III, deals with the research and development of different nanofabrication techniques and nanostructures. These techniques include litho-synthesis, colloidal lithography, and photolithography. The nanostructures that were fabricated by these techniques include the metal nanoparticle arrays, and the self-assembled CdSe nanoring arrays. At the same time, the dissertation provides mechanisms and models to describe the physical and chemical nature of these techniques. The second area of this study, in Chapter III to Chapter V, presents the applications of these nanostructures in fundamental studies, i.e. the mechanisms of plasmon enhanced fluorescence and photo-oxidation kinetics of CdSe quantum dots, and applications such as molecular sensing and material fabrication. More specifically, these applications include tuning the optical properties of CdSe quantum dots, biomodification of CdSe quantum dots, and copper ion detection using plasmon and photo enhanced CdSe quantum dots. We have successfully accomplished our research goals in this dissertation. Firstly, we were able to tune the emission wavelength of quantum dots, blue-shifted for up to 45 nm, and their surface functionalization with photo-oxidation. A kinetic model to calculate the photo-oxidation rates was established. Secondly, we established a simple mathematical model to explain the mechanism of plasmon enhanced fluoresce of quantum dots. Our calculation and experimental data support the fluorescence resonance energy transfer (FRET) mechanism between quantum dots and the metal nanoparticles. Thirdly, we successfully pattered the CdSe quantum dots (diameter ~4 nm) into nanorings with tunable diameters and annular sizes on different substrates. We also established a physical model to quantitatively explain the mechanism with the forces that involved in the formation of the nanorings. Advisors/Committee Members: Batteas, James D. (advisor), Cremer, Paul S. (advisor), Goodman, D. W. (committee member), Cheng, Zhengdong (committee member).

Subjects/Keywords: colloidal CdSe quantum dots/nanoparticles/nanocrystals; photo-oxidation/photocorrosion; kinetics; thiol capping ligands; photo-brightening/darkening/blueing; bio-conjugation/functionalization; Nanoring; plasmon enhanced fluorescence; lithography

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APA (6^th Edition):

Chen, J. (2011). Nanofabrication, Plasmon Enhanced Fluorescence and Photo-oxidation Kinetics of CdSe Nanoparticles. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7771

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Jixin. “Nanofabrication, Plasmon Enhanced Fluorescence and Photo-oxidation Kinetics of CdSe Nanoparticles.” 2011. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7771.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Jixin. “Nanofabrication, Plasmon Enhanced Fluorescence and Photo-oxidation Kinetics of CdSe Nanoparticles.” 2011. Web. 17 Jul 2019.

Vancouver:

Chen J. Nanofabrication, Plasmon Enhanced Fluorescence and Photo-oxidation Kinetics of CdSe Nanoparticles. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7771.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen J. Nanofabrication, Plasmon Enhanced Fluorescence and Photo-oxidation Kinetics of CdSe Nanoparticles. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7771

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. Chan, Yang-Hsiang. Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7805

► This dissertation focused on the applications of self-assembled monolayers (SAMs) technique for the investigation of molecule based electronics, plasmon coupling between CdSe quantum dots and… (more)

▼ This dissertation focused on the applications of self-assembled monolayers (SAMs) technique for the investigation of molecule based electronics, plasmon coupling between CdSe quantum dots and metal nanoparticles (MNPs), and copper ion detection using enhanced emission of CdSe quantum dots (QDs). The SAMs technique provides an approach to establish a robust, two-dimensional and densely packed structure which can be formed on metal or semiconductor surfaces. This allows for the design of molecular assemblies that can be used to understand the details of molecular conduction by employing various electrical testbeds. In this work, the strategy of molecular assemblies was used to pattern metal nanoparticles on GaAs surfaces, thereby furnishing a platform to explore the interactions between QDs and MNPs. The enhanced emission of CdSe QDs by MNPs was then used as a probe for ultrasensitive, cheap, and rapid copper(II) detection. The study is divided into three main facets. The first one aimed at controlling electron transport behavior through porphyrins on surfaces with an eye toward optoelectronic and light harvesting applications. The binding of the porphyrin molecules to Au surfaces, pre-covered with a dodecanethiol matrix, was characterized by FTIR, XPS, AFM, STM, of. This study has shown that the perfluoro coupling group between the porphyrin macrocycle and the thiol tether may provide a means of controlling the tunneling behavior. The second area of this study focused on the design of a simple platform to examine the coupling between metal nanostructures and quantum dot assemblies. Here we demonstrate that by using a patterned array of Au or Ag nanoparticles on GaAs, plasmon enhanced photoluminescence (PL) can be directly measured and quantified by direct scaling of regions with and without metal nanostructures. The third field presented a simple manner for using the enhanced PL of CdSe QDs as a probe for ultrasensitive Cu2+ ion detection and quantitative analysis. The PL of QDs was enhanced by two processes: first, photobrightening of the material, and second, plasmonic enhancement by coupling with Ag nanoprisms. This strong PL leads to a high sensitivity of the QDs over a wide dynamic range for Cu2+ detection, as Cu2+ efficiently quenches the QD emission. Advisors/Committee Members: Batteas, James D. (advisor), Schweikert, Emile A. (committee member), Liang, Hong (committee member), Goodman, Wayne D. (committee member).

Subjects/Keywords: CdSe QDs; plasmon coupling; Cu2+ ion sensor; porphyrin SAMs

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chan, Y. (2011). Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7805

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chan, Yang-Hsiang. “Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing.” 2011. Thesis, Texas A&M University. Accessed July 17, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7805.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chan, Yang-Hsiang. “Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing.” 2011. Web. 17 Jul 2019.

Vancouver:

Chan Y. Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7805.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chan Y. Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7805

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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