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1.
Estepp, Dallas Ann Roe.
Modification of Silver Nanoparticles in Homogeneous Solutions.
Degree: MS, Chemistry, 2017, Clemson University
URL: https://tigerprints.clemson.edu/all_theses/2747 
► Silver nanoparticles (AgNP) are used for many analytical and imaging techniques because they represent the most efficient mechanism by which light interacts with matter. The…
(more)
▼ Silver nanoparticles (AgNP) are used for many analytical and imaging techniques because they represent the most efficient mechanism by which light interacts with matter. The stability of AgNPs remains an important factor for their application. Due to their tendency to aggregate, methods for stabilizing AgNPs, mainly the addition of surfactants, have been developed. Surfactants can prevent agglomeration of AgNPs, however they can inhibit further surface modification of the particles. To overcome this problem, AgNPs were synthesized in the presence of Na2SiO3, yielding a silica shell that substantially improved the particles' stability without compromising their surface chemistry. Potential benefits are described in chapter 1. Details of this method allowing controlled thickness of a silica shell via ethanol precipitation are presented in chapter 2. These silica shells can act as a scaffold for further surface modification as well as allow the synthesis of asymmetric structures. To prove the concept of the asymmetric structure synthesis, silver dimers were synthesized by impregnating the silica shell with silver ions. Uniform dimers were made via a homogeneous solution reaction. The method is expected to find general applicability for synthesizing various oligomeric nanostructures. In chapter 4, shape change via partial dissolution of crystalline AgNPs in aqueous suspension are discussed. The dissolution of particles yielded more rounded crystals contain many small facets which are more reactivity than the large facets of the initial crystalline state. This finding opened the possibility for producing more reactive nanoparticles. That can find applications such as Surface Enhanced Raman Scattering as well as catalysis are expected to be improved upon using this more reactive crystalline form of AgNP.
Advisors/Committee Members: Dr. George Chumanov, Committee Chair, Dr. R Kenneth Marcus, Dr. Carlos D. Garcia.
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APA (6th Edition):
Estepp, D. A. R. (2017). Modification of Silver Nanoparticles in Homogeneous Solutions. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/2747
Chicago Manual of Style (16th Edition):
Estepp, Dallas Ann Roe. “Modification of Silver Nanoparticles in Homogeneous Solutions.” 2017. Masters Thesis, Clemson University. Accessed January 18, 2021.
https://tigerprints.clemson.edu/all_theses/2747.
MLA Handbook (7th Edition):
Estepp, Dallas Ann Roe. “Modification of Silver Nanoparticles in Homogeneous Solutions.” 2017. Web. 18 Jan 2021.
Vancouver:
Estepp DAR. Modification of Silver Nanoparticles in Homogeneous Solutions. [Internet] [Masters thesis]. Clemson University; 2017. [cited 2021 Jan 18].
Available from: https://tigerprints.clemson.edu/all_theses/2747.
Council of Science Editors:
Estepp DAR. Modification of Silver Nanoparticles in Homogeneous Solutions. [Masters Thesis]. Clemson University; 2017. Available from: https://tigerprints.clemson.edu/all_theses/2747
Clemson University
2.
Harris, Sarah M.
Analytical Evaluation of an Atmospheric Pressure Glow Discharge Microplasma as an Emission Source.
Degree: MS, Chemistry, 2016, Clemson University
URL: https://tigerprints.clemson.edu/all_theses/2327
► In scenarios such as environmental contamination or on-site nuclear analysis, an instrument capable of rapid, in-field chemical analysis would be faster and more cost-effective than…
(more)
▼ In scenarios such as environmental contamination or on-site nuclear analysis, an instrument capable of rapid, in-field chemical analysis would be faster and more cost-effective than the current practice of sending samples back to the laboratory for analysis. An ideal instrument for this purpose will consume little power, produce a small footprint, use small sample volumes with no sample preparation, produce no waste, and operate in ambient conditions while maintaining the high precision and accuracy needed to make time-sensitive decisions. The liquid sampling-atmospheric pressure glow discharge (LS-APGD) microplasma, developed by
Marcus and co-workers, is a novel excitation source for atomic emission spectroscopy developed to meet these goals. This emission/ionization source meets the demands needed for field-capable instrumentation by being cost efficient and having a small footprint, low power consumption, high salt/matrix tolerance, and little to no waste production. The microplasma is generated in a 1-2 mm gap sheathed in a helium gas between a stainless steel electrode and an electrolytic solution. Since its conception, the LS-APGD has been used for a variety of sample mediums (e,g,, liquid, solid, and laser ablated particles) and as an elemental and an organic ionization source, and as an emission source for detection by mass spectrometry (MS) and optical emission spectroscopy (OES), respectively. Previous research employing the LS-APGD microplasma has assessed optimized components and operating parameters for multiple sample introductions and methods of detection. This work presents an analytical study of the LS-APGD microplasma as an emission source for solution samples. The goal of this research is to illustrate the capabilities of this emission source by quantitative assessment. An evaluation of the source in terms of line selection and theoretical limits of detection progresses the microplasma towards successful implementation while the analysis of matrix effects unveils broader capabilities of analysis and deeper understanding of the source. This characterization and examination of the LS-APGD microplasma, combined with past assessments, illustrates the potential of this source as a portable instrument for in-field elemental spectroscopy.
Advisors/Committee Members: Dr. R, Kenneth Marcus, Committee Chair, Dr. George Chumanov, Dr. Brian Powell.
Subjects/Keywords: Analytical; Emission Source; Matrix Effects; Microplasma; Spectroscopy
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APA (6th Edition):
Harris, S. M. (2016). Analytical Evaluation of an Atmospheric Pressure Glow Discharge Microplasma as an Emission Source. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/2327
Chicago Manual of Style (16th Edition):
Harris, Sarah M. “Analytical Evaluation of an Atmospheric Pressure Glow Discharge Microplasma as an Emission Source.” 2016. Masters Thesis, Clemson University. Accessed January 18, 2021.
https://tigerprints.clemson.edu/all_theses/2327.
MLA Handbook (7th Edition):
Harris, Sarah M. “Analytical Evaluation of an Atmospheric Pressure Glow Discharge Microplasma as an Emission Source.” 2016. Web. 18 Jan 2021.
Vancouver:
Harris SM. Analytical Evaluation of an Atmospheric Pressure Glow Discharge Microplasma as an Emission Source. [Internet] [Masters thesis]. Clemson University; 2016. [cited 2021 Jan 18].
Available from: https://tigerprints.clemson.edu/all_theses/2327.
Council of Science Editors:
Harris SM. Analytical Evaluation of an Atmospheric Pressure Glow Discharge Microplasma as an Emission Source. [Masters Thesis]. Clemson University; 2016. Available from: https://tigerprints.clemson.edu/all_theses/2327
3.
Haupt-Renaud, Paul.
Evaluation of Next Generation Capillary-Channeled Polymer Fibers and the Implementation of C-CP Fiber Modification Modalities on Non-Fiber Substrates.
Degree: MS, Chemistry, 2016, Clemson University
URL: https://tigerprints.clemson.edu/all_theses/2343
► Developing new stationary phases for liquid chromatography is continuing to drive high performance liquid chromatography (HPLC) into the future. In this regard the Marcus’ group…
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▼ Developing new stationary phases for liquid chromatography is continuing to drive high performance liquid chromatography (HPLC) into the future. In this regard the Marcus’ group has been leveraging the continued advances of Capillary-Channeled Polymer (C-CP) fibers in an attempt to meet the demand of high throughput biomarcomolecule chromatography. Separation mechanisms studied include: ion-exchange (IC), reversed phase (RP), affinity, hydrophobic interaction chromatography (HIC). In this work, the next generation of C-CP fiber stationary phases was thoroughly evaluated with respect to hydrodynamic concerns relating to protein chromatography. Traditionally C-CP fibers have eight channels that run co-linearly along the length of the fiber. Packed C-CP fibers form a network of pseudo-open capillary structures through channels interdigitating. The fibers studied have a much higher surface area to volume ratio compared to circular fibers with similar diameters. The open tubular network has an added bonus of operating at low back pressures. C-CP fibers are non-porous with regards to biomarcomolecules, resulting in fast mass transfer kinetics causing no significant C-term band broadening. The next generation of C-CP fiber has been developed with three larger more ridged channels. This design allows for tighter packing densities without compromising channel integrity. This advancement allows the fibers to operate at higher linear velocities leading to a separation of a six-protein suit (ribonuclease A, cytochrome C, lysozyme, transferrin, bovine serum albumin, and α-chimotrypsinogen) under reversed phase conditions. Surface modification of the C-CP fibers has been accomplished with a variety of techniques, both through covalent and physical adsorption modification. Of particular interest to this work is the Lipid Tethered Ligand (LTL) surface modification modality, which has seen excellent success when employed on polypropylene C-CP fibers. LTLs functionalize a surface with ion-exchange or affinity ligands through hydrophobic physical adsorption to augment the available surface chemistry in a quick and simple flow-through system. In the work presented here, the LTL system was applied to the most commonly used polymer resin, polystyrene-divinylbenzene. The effectiveness of LTL loading, stability, and kinetics on PS-DVB was evaluated. Ligand availability was evaluated with both biotin-LTL for the extraction of streptavidin and iminodiacetic acid-LTL for the extraction of methylene blue.
Advisors/Committee Members: Dr. R. Kenneth Marcus, Committee, Chair Dr. Jeffry Anker, Dr. Carlos Garcia.
Subjects/Keywords: C-CP Fibers; Fiber Chromatography; Lipid Tethered Ligands; Surface Modification
…Clemson University. The Fibers were extruded with the
traditional eight channels and in a new…
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APA (6th Edition):
Haupt-Renaud, P. (2016). Evaluation of Next Generation Capillary-Channeled Polymer Fibers and the Implementation of C-CP Fiber Modification Modalities on Non-Fiber Substrates. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/2343
Chicago Manual of Style (16th Edition):
Haupt-Renaud, Paul. “Evaluation of Next Generation Capillary-Channeled Polymer Fibers and the Implementation of C-CP Fiber Modification Modalities on Non-Fiber Substrates.” 2016. Masters Thesis, Clemson University. Accessed January 18, 2021.
https://tigerprints.clemson.edu/all_theses/2343.
MLA Handbook (7th Edition):
Haupt-Renaud, Paul. “Evaluation of Next Generation Capillary-Channeled Polymer Fibers and the Implementation of C-CP Fiber Modification Modalities on Non-Fiber Substrates.” 2016. Web. 18 Jan 2021.
Vancouver:
Haupt-Renaud P. Evaluation of Next Generation Capillary-Channeled Polymer Fibers and the Implementation of C-CP Fiber Modification Modalities on Non-Fiber Substrates. [Internet] [Masters thesis]. Clemson University; 2016. [cited 2021 Jan 18].
Available from: https://tigerprints.clemson.edu/all_theses/2343.
Council of Science Editors:
Haupt-Renaud P. Evaluation of Next Generation Capillary-Channeled Polymer Fibers and the Implementation of C-CP Fiber Modification Modalities on Non-Fiber Substrates. [Masters Thesis]. Clemson University; 2016. Available from: https://tigerprints.clemson.edu/all_theses/2343
Clemson University
4.
Wen, Yimei.
Synthesis, Application and Protein Nanomaterial Interactions of Selected Nanofiber, Nanoparticle and Nanoarray.
Degree: PhD, Chemistry, 2017, Clemson University
URL: https://tigerprints.clemson.edu/all_dissertations/2042
► Nanomaterials have been a hot research topic for past decades due to their unique optical, electronic, catalytic and mechanical properties. This dissertation aims to investigate…
(more)
▼ Nanomaterials have been a hot research topic for past decades due to their unique optical, electronic, catalytic and mechanical properties. This dissertation aims to investigate selected aspects of nanomaterial synthesis, application and protein nanomaterial interactions. We target to improve nanomaterials synthesis, explore their novel applications and study their potential hazardous. Chapter 1 describes new hydrothermal synthesis of carbon nanofibers from cellulose nanocrystals. The described hydrothermal synthesis from cellulose is an environmentally friendly method that has commercial potential for inexpensive production of carbon nanofibers. Chapter 2 describes the application of poly(methyl methacrylate) (PMMA) stabilized 2D AgNP array for measuring changes of bulk refractive index and sensing of selected volatile organic compound (VOC). The PMMA stabilized 2D AgNP array gives linear response to bulk refractive index changes and can be re-used after rinsing with water. Responsive polymer films were spin-coated on PMMA stabilized 2D AgNP array to fabricate the nanocomposite films. These nanocomposite films exhibit sharp coherent plasmon coupling, spectra position of which is affected by the changes of local dielectric environment when interacting with VOC vapors. Chapter 3 describes studies related to the interaction of AgNP and AuNP with cytoskeleton protein (actin and tubulin), immune system protein (complementary component 3) and plasma protein (albumin and fibronegen). The nanoparticle protein interaction is influenced by both nanoparticle and protein sizes. The work presented here establishes basic knowledge related to nanomaterial synthesis and their advanced applications.
Advisors/Committee Members: Dr. George Chumanov, Committee Chair, Dr. R. Kenneth Marcus, Dr. Jeffrey N. Anker, Dr. William T. Pennington.
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APA ·
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APA (6th Edition):
Wen, Y. (2017). Synthesis, Application and Protein Nanomaterial Interactions of Selected Nanofiber, Nanoparticle and Nanoarray. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/2042
Chicago Manual of Style (16th Edition):
Wen, Yimei. “Synthesis, Application and Protein Nanomaterial Interactions of Selected Nanofiber, Nanoparticle and Nanoarray.” 2017. Doctoral Dissertation, Clemson University. Accessed January 18, 2021.
https://tigerprints.clemson.edu/all_dissertations/2042.
MLA Handbook (7th Edition):
Wen, Yimei. “Synthesis, Application and Protein Nanomaterial Interactions of Selected Nanofiber, Nanoparticle and Nanoarray.” 2017. Web. 18 Jan 2021.
Vancouver:
Wen Y. Synthesis, Application and Protein Nanomaterial Interactions of Selected Nanofiber, Nanoparticle and Nanoarray. [Internet] [Doctoral dissertation]. Clemson University; 2017. [cited 2021 Jan 18].
Available from: https://tigerprints.clemson.edu/all_dissertations/2042.
Council of Science Editors:
Wen Y. Synthesis, Application and Protein Nanomaterial Interactions of Selected Nanofiber, Nanoparticle and Nanoarray. [Doctoral Dissertation]. Clemson University; 2017. Available from: https://tigerprints.clemson.edu/all_dissertations/2042
. 
Open Access Theses and Dissertations
