+publisher:"Cornell University" +contributor:("Wiesner, Ulrich B.")

Cornell University

1. Turker, Melik. Bimodal Morphology Transition Mechanism In The Synthesis Of Two Different Silica Nanoparticles.

Degree: M.S., Materials Science and Engineering, Materials Science and Engineering, 2015, Cornell University

► Morphology transitions in the surfactant directed synthesis of mesoporous silica nanoparticles are of great interest as these materials are interesting for applications in catalysis, separation,… (more)

Subjects/Keywords: Bimodal, Morphology, Transition, Silica; Nanoparticles, Surfactant, Oil

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APA (6^th Edition):

Turker, M. (2015). Bimodal Morphology Transition Mechanism In The Synthesis Of Two Different Silica Nanoparticles. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/41141

Chicago Manual of Style (16^th Edition):

Turker, Melik. “Bimodal Morphology Transition Mechanism In The Synthesis Of Two Different Silica Nanoparticles.” 2015. Masters Thesis, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/41141.

MLA Handbook (7^th Edition):

Turker, Melik. “Bimodal Morphology Transition Mechanism In The Synthesis Of Two Different Silica Nanoparticles.” 2015. Web. 24 Jan 2021.

Vancouver:

Turker M. Bimodal Morphology Transition Mechanism In The Synthesis Of Two Different Silica Nanoparticles. [Internet] [Masters thesis]. Cornell University; 2015. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/41141.

Council of Science Editors:

Turker M. Bimodal Morphology Transition Mechanism In The Synthesis Of Two Different Silica Nanoparticles. [Masters Thesis]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/41141

Cornell University

2. Kim, Ji-Yeob. Study Of Large Molecular Weight Poly(Isoprene-B-Styrene-B-Ethylene Oxide) And Of Its Hybrid Oxides And Nitrides.

Degree: M.S., Materials Science and Engineering, Materials Science and Engineering, 2014, Cornell University

URL: http://hdl.handle.net/1813/38836

► In this study, poly(isoprene-block-styrene-block-ethylene oxide) (ISO) with molecular weight of 93,496 g mol-1 was synthesized to investigate the effect of large molecular weight on polymer… (more)

Subjects/Keywords: block copolymer; triblock terpolymer hybrids; large molecular weight polymer

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APA (6^th Edition):

Kim, J. (2014). Study Of Large Molecular Weight Poly(Isoprene-B-Styrene-B-Ethylene Oxide) And Of Its Hybrid Oxides And Nitrides. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/38836

Chicago Manual of Style (16^th Edition):

Kim, Ji-Yeob. “Study Of Large Molecular Weight Poly(Isoprene-B-Styrene-B-Ethylene Oxide) And Of Its Hybrid Oxides And Nitrides.” 2014. Masters Thesis, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/38836.

MLA Handbook (7^th Edition):

Kim, Ji-Yeob. “Study Of Large Molecular Weight Poly(Isoprene-B-Styrene-B-Ethylene Oxide) And Of Its Hybrid Oxides And Nitrides.” 2014. Web. 24 Jan 2021.

Vancouver:

Kim J. Study Of Large Molecular Weight Poly(Isoprene-B-Styrene-B-Ethylene Oxide) And Of Its Hybrid Oxides And Nitrides. [Internet] [Masters thesis]. Cornell University; 2014. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/38836.

Council of Science Editors:

Kim J. Study Of Large Molecular Weight Poly(Isoprene-B-Styrene-B-Ethylene Oxide) And Of Its Hybrid Oxides And Nitrides. [Masters Thesis]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/38836

Cornell University

3. Xu, Jiazhen. PROBING EARLY FORMATION PATHWAYS OF CRYSTAL POLYMORPHS AND THE ROLE OF SUBSTRATE USING IN-SITU X-RAY SCATTERING TECHNIQUES.

Degree: M.S., Materials Science and Engineering, Materials Science and Engineering, 2019, Cornell University

URL: http://hdl.handle.net/1813/70102

► Understanding and control of crystallographic polymorphism and crystal habit of organic compounds is scientifically and technologically important to several industries. Since a polymorph is determined… (more)

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APA (6^th Edition):

Xu, J. (2019). PROBING EARLY FORMATION PATHWAYS OF CRYSTAL POLYMORPHS AND THE ROLE OF SUBSTRATE USING IN-SITU X-RAY SCATTERING TECHNIQUES. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/70102

Chicago Manual of Style (16^th Edition):

Xu, Jiazhen. “PROBING EARLY FORMATION PATHWAYS OF CRYSTAL POLYMORPHS AND THE ROLE OF SUBSTRATE USING IN-SITU X-RAY SCATTERING TECHNIQUES.” 2019. Masters Thesis, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/70102.

MLA Handbook (7^th Edition):

Xu, Jiazhen. “PROBING EARLY FORMATION PATHWAYS OF CRYSTAL POLYMORPHS AND THE ROLE OF SUBSTRATE USING IN-SITU X-RAY SCATTERING TECHNIQUES.” 2019. Web. 24 Jan 2021.

Vancouver:

Xu J. PROBING EARLY FORMATION PATHWAYS OF CRYSTAL POLYMORPHS AND THE ROLE OF SUBSTRATE USING IN-SITU X-RAY SCATTERING TECHNIQUES. [Internet] [Masters thesis]. Cornell University; 2019. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/70102.

Council of Science Editors:

Xu J. PROBING EARLY FORMATION PATHWAYS OF CRYSTAL POLYMORPHS AND THE ROLE OF SUBSTRATE USING IN-SITU X-RAY SCATTERING TECHNIQUES. [Masters Thesis]. Cornell University; 2019. Available from: http://hdl.handle.net/1813/70102

Cornell University

4. Vaidya, Parth Nitin. BLOCK COPOLYMER INTEGRAL ASYMMETRIC MEMBRANES USING SNIPS PROCESS.

Degree: M.S., Materials Science and Engineering, Materials Science and Engineering, 2017, Cornell University

URL: http://hdl.handle.net/1813/57000

► Over the last decade, membranes prepared using block copolymer self-assembly and non-solvent induced phase separation (SNIPS) process have become increasingly desirable candidates for water purification… (more)

▼ Over the last decade, membranes prepared using block copolymer self-assembly and non-solvent induced phase separation (SNIPS) process have become increasingly desirable candidates for water purification and protein separation applications due to their excellent permselectivity. However, biofouling is a major problem encountered in the filtration process as it may lead to a reduction in effective pore size, pore blockage and formation of a biofilm on the membrane surface. Thus, there is a pressing need to design new systems that incorporate an anti-fouling property while retaining the high performance capabilities of SNIPS membranes. Poly(ethylene oxide) (PEO) is a promising candidate to reduce membrane fouling due to its hydrophilic nature. To date it has remained challenging to extend the SNIPS process to new polymers with PEO end block, including poly(isoprene-b-styrene-b-ethylene oxide) (ISO), which involves optimizing a multitude of parameters to obtain desired membrane structure and performance. To overcome this impediment, two chemically distinct triblock terpolymers, poly(isoprene-b-styrene-b-(4-vinyl) pyridine) (ISV) and ISO were blended in the dope solution in order to fabricate membranes using the SNIPS process. The weight ratio of ISV to ISO in the blended solutions was varied. Scanning Electron Microscopy (SEM) images of both the pure ISV and blended membranes reveal a mesoporous skin layer atop a macroporous substructure. The asymmetric membranes from 9:1 and 7:3 blends retained their pH-responsive permeability behavior characteristic to pure ISV membranes. Additionally, about a three-fold decrease in protein adsorption was observed in 5:5 blended membranes compared to pure ISV, likely due to the antifouling property of PEO. Thus, the blended membranes exhibit properties characteristic of the chemistries present in both the parent block copolymers. This study corroborates the ability and ease of the SNIPS process combined with a facile “mix and match” approach to access and tailor unique chemical functionalities in a single membrane opening doors to previously challenging property combinations. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Joo, Yong L. (committee member).

Subjects/Keywords: Nanoscience; Materials Science; anti-fouling; asymmetric membranes; SNIPS; triblock terpolymer; Blending; Polymer chemistry; Self-assembly

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APA (6^th Edition):

Vaidya, P. N. (2017). BLOCK COPOLYMER INTEGRAL ASYMMETRIC MEMBRANES USING SNIPS PROCESS. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/57000

Chicago Manual of Style (16^th Edition):

Vaidya, Parth Nitin. “BLOCK COPOLYMER INTEGRAL ASYMMETRIC MEMBRANES USING SNIPS PROCESS.” 2017. Masters Thesis, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/57000.

MLA Handbook (7^th Edition):

Vaidya, Parth Nitin. “BLOCK COPOLYMER INTEGRAL ASYMMETRIC MEMBRANES USING SNIPS PROCESS.” 2017. Web. 24 Jan 2021.

Vancouver:

Vaidya PN. BLOCK COPOLYMER INTEGRAL ASYMMETRIC MEMBRANES USING SNIPS PROCESS. [Internet] [Masters thesis]. Cornell University; 2017. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/57000.

Council of Science Editors:

Vaidya PN. BLOCK COPOLYMER INTEGRAL ASYMMETRIC MEMBRANES USING SNIPS PROCESS. [Masters Thesis]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/57000

Cornell University

5. Hur, Kahyun. Predicting Nanostructures And Photonic Properties Of Block Copolymer Derived Materials.

Degree: PhD, Materials Science and Engineering, 2013, Cornell University

URL: http://hdl.handle.net/1813/33886

► Bottom up type block copolymer (BCP) self-assembly and co-assembly are expected to provide facile routes to nanostructured materials for various, e.g. energy related and photonics,… (more)

▼ Bottom up type block copolymer (BCP) self-assembly and co-assembly are expected to provide facile routes to nanostructured materials for various, e.g. energy related and photonics, applications. In many of these experimental systems, chemical building blocks are complex organic/inorganic hybrid molecules such as ligandstabilized NPs. In particular, for complex multicomponent systems involving assembly of nanoparticles (NPs) and macromolecules, limited understanding of the role of such key factors has severely hampered progress. Despite progress in simulations and theories, structure prediction of selfassembled materials beyond simple model systems remain challenging. To this end, an efficient theoretical framework that unifies polymer field theory and density functional theory into a single method was presented in order to incorporate complex molecular details with key physical interactions. The method harnesses the efficiency of selfconsistent field theories and the flexibility of density functional theory and a generalized propagator method enabling the description of different types of components and interactions, i.e. it allows a level of complexity usually reserved to more costly molecular simulation treatments. Utilizing the method, design criteria for controlling a range of NP based nanomaterial structures were studied. As an application of BCP derived materials, their photonic properties were studied. Metamaterials, engineered metallic materials, offer new functionalities such as super-resolution imaging and cloaking. Despite considerable progress, finding efficient pathways towards 3-dimensionally isotropic metamaterials remains challenging thus hampering their practical applications. To this end, the photonic properties of 3-dimensionally isotropic metallic nanomaterials with the cubic double gyroid and the alternating gyroid morphologies were calculated. These materials can be obtained by block copolymer self-assembly with a unit cell significantly smaller than the free space wavelength of visible light. For double gyroid metamaterials, the materials parameters and design principles for negative-refractive index materials in the visible and near infrared spectrum were specifically identified. Lastly surface plasmon resonance phenomena of novel metamaterials were investigated. Especially, 3-dimensionally continuous metamaterials with the diamond cubic structure display both negative refractive index as well as complete surface plasmon band gaps in 3-dimensions. Results suggest further design criteria and indepth understandings for metamaterials exhibiting unusual optical properties. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Hennig, Richard G. (committee member), Escobedo, Fernando (committee member).

Subjects/Keywords: MATERIALS; block copolymer; THEORY; METAMATERIAL; PLASMONICS

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APA (6^th Edition):

Hur, K. (2013). Predicting Nanostructures And Photonic Properties Of Block Copolymer Derived Materials. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33886

Chicago Manual of Style (16^th Edition):

Hur, Kahyun. “Predicting Nanostructures And Photonic Properties Of Block Copolymer Derived Materials.” 2013. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/33886.

MLA Handbook (7^th Edition):

Hur, Kahyun. “Predicting Nanostructures And Photonic Properties Of Block Copolymer Derived Materials.” 2013. Web. 24 Jan 2021.

Vancouver:

Hur K. Predicting Nanostructures And Photonic Properties Of Block Copolymer Derived Materials. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/33886.

Council of Science Editors:

Hur K. Predicting Nanostructures And Photonic Properties Of Block Copolymer Derived Materials. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33886

Cornell University

6. Sun, Yao. Silica-Based Nanoparticles: Synthesis, Characterization, And Structural Control.

Degree: PhD, Materials Science and Engineering, 2014, Cornell University

URL: http://hdl.handle.net/1813/38957

► Mesoporous silica nanoparticles (MSNs) combine the benefits of nanomaterials and mesoporous silica materials. This class of materials is characterized by ordered pore structures, controllable pore… (more)

Subjects/Keywords: Silica; Nanoparticles

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

APA (6^th Edition):

Sun, Y. (2014). Silica-Based Nanoparticles: Synthesis, Characterization, And Structural Control. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/38957

Chicago Manual of Style (16^th Edition):

Sun, Yao. “Silica-Based Nanoparticles: Synthesis, Characterization, And Structural Control.” 2014. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/38957.

MLA Handbook (7^th Edition):

Sun, Yao. “Silica-Based Nanoparticles: Synthesis, Characterization, And Structural Control.” 2014. Web. 24 Jan 2021.

Vancouver:

Sun Y. Silica-Based Nanoparticles: Synthesis, Characterization, And Structural Control. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/38957.

Council of Science Editors:

Sun Y. Silica-Based Nanoparticles: Synthesis, Characterization, And Structural Control. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/38957

Cornell University

7. Oleske, Katharine Wanda. NANOPATTERNING CHEMISTRY TO CONTROL THE GROWTH OF TRANSITION METAL OXIDES.

Degree: PhD, Materials Science and Engineering, 2017, Cornell University

URL: http://hdl.handle.net/1813/59128

► Despite advances in nanomaterials synthesis, the bottom-up preparation of nanopatterned films as templates for spatially confined surface reactions and nucleation of crystalline inorganics remains a… (more)

▼ Despite advances in nanomaterials synthesis, the bottom-up preparation of nanopatterned films as templates for spatially confined surface reactions and nucleation of crystalline inorganics remains a challenge. I developed an approach to fabricating nanoscale thin film surface structures with periodicities on the order of 20 to 50 nm and with the capacity to localize reactions with small molecules and nanoparticles. A block copolymer (BCP) of polystyrene-block-poly[(allyl glycidyl ether)-co-(ethylene oxide)] (PS-b-P(AGE-co-EO)) is used to prepare periodically-ordered, reactive thin films. As proof-of-principle demonstrations of the versatility of the chemical functionalization, a small organic molecule, an amino acid, and ultrasmall silica nanoparticles are selectively attached via thiol-ene click chemistry to the exposed P(AGE-co-EO) domains of the BCP thin film. My approach employing click chemistry on the spatially confined reactive surfaces of a BCP thin film overcomes the solvent incompatibilities typically encountered when synthetic polymers are functionalized with water-soluble molecules. Moreover, this post-assembly functionalization of a reactive thin film surface preserves the original patterning, reduces the amount of required reactant, and leads to short reaction times. The small molecule functionalized area can subsequently template the confined crystallization of copper (I) oxide (Cu2O) and zinc oxide (ZnO) with high fidelity, from aqueous solutions at low temperatures (below 60 °C) with periodicities on the order of 50 nm. The demonstrated method provides a versatile materials platform to control the growth of nanostructured crystalline materials via the introduction of a plethora of surface functional groups. The resulting organic substrates can be used to template the growth and control the crystal orientation and texturing of multiple different crystalline inorganic materials on surfaces nanostructured via BCP self-assembly. The demonstrated approach is expected to provide a new materials platform in applications including sensing, catalysis, pattern recognition, or microelectronics. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Putnam, David A. (committee member), Estroff, Lara A. (committee member).

Subjects/Keywords: crystallization; thin film; Materials Science; biomineralization; oxide; Polymer

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APA (6^th Edition):

Oleske, K. W. (2017). NANOPATTERNING CHEMISTRY TO CONTROL THE GROWTH OF TRANSITION METAL OXIDES. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59128

Chicago Manual of Style (16^th Edition):

Oleske, Katharine Wanda. “NANOPATTERNING CHEMISTRY TO CONTROL THE GROWTH OF TRANSITION METAL OXIDES.” 2017. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59128.

MLA Handbook (7^th Edition):

Oleske, Katharine Wanda. “NANOPATTERNING CHEMISTRY TO CONTROL THE GROWTH OF TRANSITION METAL OXIDES.” 2017. Web. 24 Jan 2021.

Vancouver:

Oleske KW. NANOPATTERNING CHEMISTRY TO CONTROL THE GROWTH OF TRANSITION METAL OXIDES. [Internet] [Doctoral dissertation]. Cornell University; 2017. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59128.

Council of Science Editors:

Oleske KW. NANOPATTERNING CHEMISTRY TO CONTROL THE GROWTH OF TRANSITION METAL OXIDES. [Doctoral Dissertation]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/59128

Cornell University

8. Derrien, Thomas Louis Frederic. THE DYNAMICS OF DNA-CAPPED GOLD NANOPARTICLE SUPERLATTICE ASSEMBLY IN ELECTROLYTE SOLUTIONS.

Degree: PhD, Biological and Environmental Engineering, 2017, Cornell University

URL: http://hdl.handle.net/1813/51632

► Highly ordered nanoparticle arrays, or nanoparticle superlattices, are a sought after class of materials due to their novel physical properties, distinct from both the individual… (more)

Subjects/Keywords: crystallization; Gold Nanoparticles; superlattices; Physical chemistry; Materials Science; DNA; Nanoparticles; Self-assembly

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APA (6^th Edition):

Derrien, T. L. F. (2017). THE DYNAMICS OF DNA-CAPPED GOLD NANOPARTICLE SUPERLATTICE ASSEMBLY IN ELECTROLYTE SOLUTIONS. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/51632

Chicago Manual of Style (16^th Edition):

Derrien, Thomas Louis Frederic. “THE DYNAMICS OF DNA-CAPPED GOLD NANOPARTICLE SUPERLATTICE ASSEMBLY IN ELECTROLYTE SOLUTIONS.” 2017. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/51632.

MLA Handbook (7^th Edition):

Derrien, Thomas Louis Frederic. “THE DYNAMICS OF DNA-CAPPED GOLD NANOPARTICLE SUPERLATTICE ASSEMBLY IN ELECTROLYTE SOLUTIONS.” 2017. Web. 24 Jan 2021.

Vancouver:

Derrien TLF. THE DYNAMICS OF DNA-CAPPED GOLD NANOPARTICLE SUPERLATTICE ASSEMBLY IN ELECTROLYTE SOLUTIONS. [Internet] [Doctoral dissertation]. Cornell University; 2017. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/51632.

Council of Science Editors:

Derrien TLF. THE DYNAMICS OF DNA-CAPPED GOLD NANOPARTICLE SUPERLATTICE ASSEMBLY IN ELECTROLYTE SOLUTIONS. [Doctoral Dissertation]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/51632

Cornell University

9. Gu, Yibei. Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications.

Degree: PhD, Materials Science and Engineering, 2015, Cornell University

URL: http://hdl.handle.net/1813/41175

► Block copolymer (BCP) self-assembly provides access to well-ordered nanostructures with tunable morphologies on a typical length scale of 5 - 50 nm. A unique approach… (more)

▼ Block copolymer (BCP) self-assembly provides access to well-ordered nanostructures with tunable morphologies on a typical length scale of 5 - 50 nm. A unique approach combining BCP self-assembly and non-solvent induced phase separation (SNIPS) allows direct formation of graded porous superstructures that can be used in various applications. The graded superstructure is composed of a uniform mesoporous surface layer of ~ 100 nm thickness on top of a spongelike macroporous support layer of tens of micrometers in thickness. It has been utilized to make ultrafiltration membranes for water treatment and selective separation. In the first part, further development on SNIPS polymeric membranes is discussed. In situ grazing incidence small-angle X-ray scattering (GISAXS) was employed to study the structure evolution on doctor-bladed BCP films for membrane purposes. Transient ordered structures were observed during solvent evaporation, providing insights into the membrane formation mechanism. This method serves as a predictive tool and offers the potential to optimize the key parameters for SNIPS membrane production. By incorporating additives in the BCP self-assembly, the CNIPS (co-assembly and non-solvent induced phase separation) process is developed. CNIPS provides a new self-assembly platform upon which multifunctional and high-performance membranes can be formed. For example, an inexpensive small organic additive glycerol was successfully incorporated in membrane fabrication at various amounts. These CNIPS polymeric membranes have wide tunable pore sizes and provide a pathway to expand from ultrafiltraion towards nanofiltraion applications. In the second part, the discussion moves from purely polymeric structures towards organic-inorganic hybrid and purely inorganic graded porous structures. These hybrid/inorganic materials enable advanced membranes and a lot of other applications. To include additional functionalities, the CNIPS method was employed to introduce inorganic nanoparticles into the membranes. For example, a graded porous organic-inorganic hybrid membrane was achieved successfully by incorporating BCP and inorganic TiO2 sol nanoparticles through CNIPS. Hybrid membranes were reported to have significant increase in the permeability compared to plain polymeric membranes. Templating from SNIPS derived BCP structures, graded porous carbon, metal, and metal oxide materials were synthesized. We expect that such nanostructured porous inorganic materials may find use in applications such as separation, catalysis, biomedical implants, as well as energy conversion and storage. Advisors/Committee Members: Wiesner,Ulrich B. (chair), Ober,Christopher Kemper (committee member), Abruna,Hector D (committee member).

Subjects/Keywords: block copolymer self-assembly; graded porous materials; filtration membranes

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APA (6^th Edition):

Gu, Y. (2015). Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/41175

Chicago Manual of Style (16^th Edition):

Gu, Yibei. “Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications.” 2015. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/41175.

MLA Handbook (7^th Edition):

Gu, Yibei. “Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications.” 2015. Web. 24 Jan 2021.

Vancouver:

Gu Y. Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications. [Internet] [Doctoral dissertation]. Cornell University; 2015. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/41175.

Council of Science Editors:

Gu Y. Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications. [Doctoral Dissertation]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/41175

Cornell University

10. Tan, Kwan. Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications.

Degree: PhD, Materials Science and Engineering, 2014, Cornell University

URL: http://hdl.handle.net/1813/38861

► Self-assembly is employed in nature to build multi-dimensional hierarchical materials and represents a viable synthetic approach to construct next-generation functional materials for a large number… (more)

▼ Self-assembly is employed in nature to build multi-dimensional hierarchical materials and represents a viable synthetic approach to construct next-generation functional materials for a large number of applications. This dissertation describes the design, synthesis and characterization of multifunctional nanostructured hybrid materials on multiple length scales by co-assembly of organic and organic/inorganic components. These materials are promising for a number of applications, and in particular for energy conversion devices. In the first part, organic-inorganic co-assembly is coupled with conventional heating (102-105 s) to generate hybrid materials for solid-state hybrid solar cells. A polyisoprene-block-polystyrene-block-polyethylene oxide (PI-b-PS-b-PEO) triblock terpolymer was employed to structure-direct alumina sol to form mesoporous block copolymer (BCP) directed alumina superstructures. In situ grazing incidence wideangle X-ray scattering and scanning electron microscopy were utilized to probe the structural evolution of methylammonium lead trihalide perovskite on mesoporous BCPdirected alumina superstructures during thermal annealing. A crystalline precursor structure not previously described was discovered to be highly crucial in enhancing perovskite film morphology and coverage, leading to better performing hybrid perovskite solar cells. Time/temperature control in thermal annealing enabled tuning the macroscopic perovskite film morphology and the crystal texture simultaneously. Extending the concept of time/temperature control in structure formation, the second part of the dissertation focuses on directed self-assembly using transient heating (10-8-10-3 s) to generate porous crystalline semiconductor and organic nanostructures. In a first example, a 308 nm pulsed XeCl excimer laser was used to induce transient melting of amorphous silicon in colloidal self-assembly-directed silica templates, which subsequently solidified into crystalline silicon nanostructures with hexagonal nonclose-packed symmetry. Subsequently, by harnessing the thermal stability enhancement of organic polymers under transient heating, direct laser writing of porous organic structures is discussed by combining block copolymer-resol co-assembly with a 10.6 [MICRO SIGN]m continuous wave CO2 laser-induced transient heating. Organic-organic hybrid thin films of PI-b-PS-b-PEO mixed with resorcinol-formaldehyde resol oligomers were heated by the CO2 laser on sub-millisecond time scales, inducing PI-b-PS-b-PEO decomposition and resol thermopolymerization, to form hierarchical porous resin polymer structures with 3D connectivity, high surface areas and exceptional chemical, mechanical and thermal properties. The porous resin structures are highly suitable for a number of potential applications, e.g., microfluidic reactors, BCP organic templating to generate crystalline silicon network nanostructures, and energy conversion and storage. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Disalvo, Francis J (committee member), Thompson, Michael Olgar (committee member).

Subjects/Keywords: Block copolymer self-assembly; Laser Annealing; Hybrid Nanostructures

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APA (6^th Edition):

Tan, K. (2014). Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/38861

Chicago Manual of Style (16^th Edition):

Tan, Kwan. “Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications.” 2014. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/38861.

MLA Handbook (7^th Edition):

Tan, Kwan. “Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications.” 2014. Web. 24 Jan 2021.

Vancouver:

Tan K. Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/38861.

Council of Science Editors:

Tan K. Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/38861

Cornell University

11. Kohle, Ferdinand Friedrich Erich. Characterizing and Controlling Optical Properties of Nanomaterials for Applications in Optical Super-Resolution Microscopy, Cancer Theranostics, and Arts and Architecture.

Degree: PhD, Chemistry and Chemical Biology, 2018, Cornell University

URL: http://hdl.handle.net/1813/59732

► Optical properties of nano-sized materials (optical nanomaterials) can either be the result of interactions of light with periodic material structures, e.g. in colloidal or block… (more)

▼ Optical properties of nano-sized materials (optical nanomaterials) can either be the result of interactions of light with periodic material structures, e.g. in colloidal or block copolymer based photonic crystals, or stem from the incorporation of photoactive molecules into nano-sized, optically inactive materials, e.g. fluorescent dyes in organic-inorganic hybrid silica nanoparticles. This dissertation introduces representatives of both material classes. The first case described here are ultrasmall (sub-10 nm) amorphous silica nanoparticles (SNPs) covalently encapsulating photoactive organic moieties. Such particles, referred to as Cornell prime dots (C’ dots), have already shown tremendous success in the safe diagnosis of cancer in human clinical trials with melanoma patients. However, their full potential in the lab and clinical setting, as diagnostic as well as therapeutic probes, has not yet been fully explored. Furthermore, comprehensive understanding of particle structure-property correlations, i.e. core and surface properties, remains limited. In the first part of this dissertation, a new approach for characterizing the particles is introduced using a combination of fluorescence correlation spectroscopy (FCS), single particle bleaching, and high-performance liquid chromatography (HPLC). It is shown that the net charge of organic dyes introduced in the synthesis is a main contributor to chemical surface heterogeneities of the particles. In the second part of this thesis a new class of ultrasmall theranostic silica nanoparticles for the application in photodynamic therapy is described. It is demonstrated that high effective singlet oxygen quantum yields can be achieved, while keeping particle size below the threshold for renal clearance (sub-10 nm). Next, the concept of particle molecular photo-engineering (PMPE) is introduced as a means to tailor photophysical properties of organic dye encapsulating SNPs. By precisely engineering the chemical composition of the amorphous silica particle core network around encapsulated organic dyes using specific functional groups, i.e. mercaptopropyl or iodopropyl groups, dye transient dark states can be controlled which in turn enables super-resolution microscopy and substantially enhanced singlet oxygen quantum yields, respectively. The second class of optical nanomaterials in this dissertation is a self-assembled poly(styrene-block-tert-butyl methacrylate) (StB) diblock copolymer with a photonically active lamellar structure. Bottom-up self-assembly processes provide highly desired and cost-effective methods for the fabrication of large scale/area photonic coatings, making such materials interesting candidates for applications in architecture and design. In part three of this thesis the synthesis of ultralarge molar mass StB block copolymers and their application as iridescent and transparent thin film coatings is described. Development of a casting-lamination process to apply such coatings to window panels allowed the first architectural use of block copolymers as an… Advisors/Committee Members: Wiesner, Ulrich B. (chair), Baird, Barbara Ann (committee member), Estroff, Lara A. (committee member).

Subjects/Keywords: silica nanoparticles; Nanoscience; Physical chemistry; Materials Science; photodynamic therapy; Fluorescence Correlation Spectroscopy; Optical Microscopy; Structural Color; architecture

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APA (6^th Edition):

Kohle, F. F. E. (2018). Characterizing and Controlling Optical Properties of Nanomaterials for Applications in Optical Super-Resolution Microscopy, Cancer Theranostics, and Arts and Architecture. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59732

Chicago Manual of Style (16^th Edition):

Kohle, Ferdinand Friedrich Erich. “Characterizing and Controlling Optical Properties of Nanomaterials for Applications in Optical Super-Resolution Microscopy, Cancer Theranostics, and Arts and Architecture.” 2018. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59732.

MLA Handbook (7^th Edition):

Kohle, Ferdinand Friedrich Erich. “Characterizing and Controlling Optical Properties of Nanomaterials for Applications in Optical Super-Resolution Microscopy, Cancer Theranostics, and Arts and Architecture.” 2018. Web. 24 Jan 2021.

Vancouver:

Kohle FFE. Characterizing and Controlling Optical Properties of Nanomaterials for Applications in Optical Super-Resolution Microscopy, Cancer Theranostics, and Arts and Architecture. [Internet] [Doctoral dissertation]. Cornell University; 2018. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59732.

Council of Science Editors:

Kohle FFE. Characterizing and Controlling Optical Properties of Nanomaterials for Applications in Optical Super-Resolution Microscopy, Cancer Theranostics, and Arts and Architecture. [Doctoral Dissertation]. Cornell University; 2018. Available from: http://hdl.handle.net/1813/59732

Cornell University

12. Hansen, Nathaniel. Inorganic Electrospun Nanofibers: From Rational Catalyst Design To Power Generation Materials.

Degree: PhD, Chemical Engineering, 2012, Cornell University

URL: http://hdl.handle.net/1813/29446

► Purely inorganic electrospun nanofibers containing iron and nickel catalytic nanocrystals are generated via sol-gel chemistry, with those nanocrystals in various concenctrations as well as locations… (more)

▼ Purely inorganic electrospun nanofibers containing iron and nickel catalytic nanocrystals are generated via sol-gel chemistry, with those nanocrystals in various concenctrations as well as locations by coaxial electrospinning. These nanofibers, following thermal treatment and precursor crystallization, are then applied as catalysts to the alkaline hydrolysis of glucose where they display conversions that increase with increasing catalyst concentration at the surface of the nanofiber. However, a long pretreatment drying time is required to reactivate the entrained catalyst. To decrease the pretreatment drying time a new fabrication method is developed; binding high concentrations of metal salts to a water-soluble polymer, electrospinning and using thermal treatments to remove the polymer and crystallize the metal salts. Nanofibers of a variety of morphologies and concentrations are fabricated through this approach and applied to the alkaline hydrolysis of glucose. These results detail that by increasing the concentration of available catalytic surface area within the diffusion length scale of the reactant, the temperature range at which near pure hydrogen is produced increases nearly 60˚C. Subsequently this highly loaded water based electrospinning approach is used to generate nanofibers for a variety of applications. The electrical conductivity of these nanofibers are found for a variety of metals, including copper, iron, nickel and cobalt, and shown to be: tunable with the crystal morphology within the nanofiber matrix, orders of magnitude higher than conductivities reported for other one dimensional materials, and directionally controlled by the anisotropy of the nanofiber mat. The magnetic properties of iron, nickel, and cobalt nanofibers are shown to be a function of both size and temperature ranging from near superparamagnetic behavior to highly coercive as controlled by precursor inclusion and thermal treatment procedure. Alternating layers of aligned nanofibers are subsequently used to overcome curling effects caused by volume loss during thermal treatment. By orienting perpendicular layers next to each other, axial shrinkage is minimized thereby maintaining long, linear nanofibers as well as flat, macroscopic mats. Finally, using the highly loaded water-based technique and the alternating layers of nanofibers, preliminary nanofibrous materials are synthesized for power generation applications such as lithium ion battery anodic materials and thin film photovoltaic devices. These materials display great promise due to high surface areas containing proper band gap or high capacity materials, but many future works are proposed for these materials. Advisors/Committee Members: Joo, Yong L. (chair), Wiesner, Ulrich B. (committee member), Hanrath, Tobias (committee member).

Subjects/Keywords: Electrospinning; Inorganic Nanofiber; Power Generation Nanomaterials

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APA (6^th Edition):

Hansen, N. (2012). Inorganic Electrospun Nanofibers: From Rational Catalyst Design To Power Generation Materials. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/29446

Chicago Manual of Style (16^th Edition):

Hansen, Nathaniel. “Inorganic Electrospun Nanofibers: From Rational Catalyst Design To Power Generation Materials.” 2012. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/29446.

MLA Handbook (7^th Edition):

Hansen, Nathaniel. “Inorganic Electrospun Nanofibers: From Rational Catalyst Design To Power Generation Materials.” 2012. Web. 24 Jan 2021.

Vancouver:

Hansen N. Inorganic Electrospun Nanofibers: From Rational Catalyst Design To Power Generation Materials. [Internet] [Doctoral dissertation]. Cornell University; 2012. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/29446.

Council of Science Editors:

Hansen N. Inorganic Electrospun Nanofibers: From Rational Catalyst Design To Power Generation Materials. [Doctoral Dissertation]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/29446

Cornell University

13. Li, Yuk Mun. TRIBLOCK TERPOLYMER DERIVED ISOPOROUS ULTRAFILTRATION MEMBRANES.

Degree: PhD, Chemical Engineering, 2018, Cornell University

URL: http://hdl.handle.net/1813/59467

► Block copolymer derived nanostructured materials provide a unique platform for the development of nanotechnological applications ranging from the microelectronics industry all the way to separation.… (more)

▼ Block copolymer derived nanostructured materials provide a unique platform for the development of nanotechnological applications ranging from the microelectronics industry all the way to separation. A particularly interesting approach that has received increasing attention in the last couple of years is the formation of isoporous ultrafiltration membranes via the combination of block copolymer self-assembly (SA) with industrially proven non-solvent induced phase separation (NIPS), a process now referred to as SNIPS. Triblock terpolymer based NIPS membranes have been investigated as a result of their improved mechanical toughness over the corresponding diblock copolymer derived membranes. To expand our understanding of this new area of block copolymer science and engineering, in this thesis SNIPS derived membranes were investigated based on triblock terpolymer poly(isoprene-b-styrene-b-4-vinylpyridine) (ISV). In a first effort, the effects of different casting parameters on membrane substructure morphology were studied. Experimental results elucidated a substructure morphology transition from finger-like to sponge-like through increasing dope concentration, evaporation time, and varying solvent compositions. Membranes with finger-like and sponge-like substructures were integrated with nylon supports to enhance mechanical stability for testing and handling and were evaluated for their hydraulic permeabilities. The effects of an important but often overlooked environmental casting parameter, relative humidity, were subsequently assessed on ISV membranes with a focus on membrane surface pore structure. Membranes cast at an optimized relative humidity of 40% were characterized by a high density of square packed surface pores. Additionally, precise control over the rate of permeation of a small molar mass solute was realized through variation in triblock terpolymer molar mass. After investigation of the SNIPS process and the associated molecular engineering of membrane properties via variation of process parameters and molecular architecture, new insights into the fabrication of asymmetric membranes were obtained from employing two chemically distinct triblock terpolymers in the dope used during the SNIPS process. Initial proof-of-principle experiments with mixtures of ISV and poly(isoprene-b-styrene-b-(dimethylamino)ethylmethacrylate) (ISA) demonstrated that the use of mixtures of chemically distinct triblock terpolymers enables the tailoring of membrane pore surface chemistries. This approach was subsequently used to improve membrane fouling properties by working with mixtures from ISV and terpolymer poly(isoprene-b-styrene-b-ethylene oxide) (ISO) which on its own is difficult to process into useful SNIPS membranes. Experimental results established that blended triblock terpolymer membranes exhibited a combination of properties intrinsic to the two specific block copolymers utilized. This opens access to designer membranes with desired pore surface chemical properties via a facile “mix and match” approach. The results of… Advisors/Committee Members: Wiesner, Ulrich B. (chair), Joo, Yong L. (committee member), Estroff, Lara A. (committee member).

Subjects/Keywords: Chemical engineering; asymmetric; block copolymer; membranes; ultrafiltration; SNIPS; Materials Science; Self-assembly

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

APA (6^th Edition):

Li, Y. M. (2018). TRIBLOCK TERPOLYMER DERIVED ISOPOROUS ULTRAFILTRATION MEMBRANES. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59467

Chicago Manual of Style (16^th Edition):

Li, Yuk Mun. “TRIBLOCK TERPOLYMER DERIVED ISOPOROUS ULTRAFILTRATION MEMBRANES.” 2018. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59467.

MLA Handbook (7^th Edition):

Li, Yuk Mun. “TRIBLOCK TERPOLYMER DERIVED ISOPOROUS ULTRAFILTRATION MEMBRANES.” 2018. Web. 24 Jan 2021.

Vancouver:

Li YM. TRIBLOCK TERPOLYMER DERIVED ISOPOROUS ULTRAFILTRATION MEMBRANES. [Internet] [Doctoral dissertation]. Cornell University; 2018. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59467.

Council of Science Editors:

Li YM. TRIBLOCK TERPOLYMER DERIVED ISOPOROUS ULTRAFILTRATION MEMBRANES. [Doctoral Dissertation]. Cornell University; 2018. Available from: http://hdl.handle.net/1813/59467

Cornell University

14. Zhang, Qi. BLOCK COPOLYMER DERIVED FUNCTIONAL NANOMATERIALS WITH THREE DIMENSIONAL POROUS STRUCTURES FOR PHOTONICS AND WATER APPLICATION.

Degree: PhD, Materials Science and Engineering, 2018, Cornell University

URL: http://hdl.handle.net/1813/59343

► Block copolymer (BCP) self-assembly provides a convenient approach to access nanostructures at the tens of nanometer scale. Porous scaffolds from block copolymer self-assembled morphologies have… (more)

▼ Block copolymer (BCP) self-assembly provides a convenient approach to access nanostructures at the tens of nanometer scale. Porous scaffolds from block copolymer self-assembled morphologies have a plethora of applications in areas including energy, filtration, and photonic devices. Selectively etching methods to remove one block are typically used to achieve porous structures derived from BCP equilibrium morphologies. BCP directed additive co-assembly, facilitated by thermal or solvent-vapor annealing processes and followed by BCP removal, is also routinely employed to achieve porous structures composed of non-BCP materials. In the first part of this thesis, fabrication and characterization of three dimensional (3D) gyroidal mesoporous thin films are discussed made from BCP-resin/carbon composites. Spin-coated films made from triblock terpolymer plus pre-carbon precursors were subjected to solvent vapor annealing (SVA) to reach the desired gyroidal equilibrium morphology. In situ grazing incidence small angle x-ray scattering (GISAXS) was employed to elucidate structure evolution at different swelling stages during SVA and to identify appropriate conditions to quench films into the gyroid structure at room temperature. After crosslinking of carbon precursors and thermal decomposition of the BCP, a carbon scaffold with gyroid morphology was formed. Such 3D gyroidal thin films have multiple advantages over conventional templates. They have high temperature resistance up to 900 °C under non-oxidizing conditions, which makes them compatible with deposition processes such as chemical vapor deposition. 3D pore size and hydrophilicity are tunable, facilitating the deposition of different types of materials into the nano-scale pores. Finally, a transfer technique for such gyroidal mesoporous thin films was developed to eliminate restrictions of film formation to specific substrates. These gyroidal carbon mesoporous thin film templates largely expand the materials selection pool for gyroidal structures. BCPs not only provide 3D scaffolds from equilibrium morphologies, but also can form 3D hierarchical superstructures with graded meso- to macro-scale pores from non-equilibrium processes. Resulting membranes have uniform surface mesopores supported by a graded macroporous sublayer. The process to generate such asymmetric ultrafiltration membranes is termed self-assembly plus non-solvent induced phase separation, or simply SNIPS. SNIPS membrane performance is largely controlled by details of the meso- and macro-porous structures. In the second part of this thesis, BCP derived SNIPS membrane ultrafiltration performance with respect to flux and solute diffusion rates is studied in relation to surface mesoporous and sublayer macroporous structures. These structures are systematically tuned identifying several key factors in the membrane casting process. To explore SNIPS membrane pore surface functionality, a new BCP membranes was designed and synthesized with thiol functional groups exposed on pore walls and membrane surfaces. A… Advisors/Committee Members: Wiesner, Ulrich B. (chair), Ober, Christopher Kemper (committee member), Thompson, Michael Olgar (committee member).

Subjects/Keywords: Block copolymer self-assembly; Functional nanomaterials; Materials Science; 3D structure

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APA (6^th Edition):

Zhang, Q. (2018). BLOCK COPOLYMER DERIVED FUNCTIONAL NANOMATERIALS WITH THREE DIMENSIONAL POROUS STRUCTURES FOR PHOTONICS AND WATER APPLICATION. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59343

Chicago Manual of Style (16^th Edition):

Zhang, Qi. “BLOCK COPOLYMER DERIVED FUNCTIONAL NANOMATERIALS WITH THREE DIMENSIONAL POROUS STRUCTURES FOR PHOTONICS AND WATER APPLICATION.” 2018. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59343.

MLA Handbook (7^th Edition):

Zhang, Qi. “BLOCK COPOLYMER DERIVED FUNCTIONAL NANOMATERIALS WITH THREE DIMENSIONAL POROUS STRUCTURES FOR PHOTONICS AND WATER APPLICATION.” 2018. Web. 24 Jan 2021.

Vancouver:

Zhang Q. BLOCK COPOLYMER DERIVED FUNCTIONAL NANOMATERIALS WITH THREE DIMENSIONAL POROUS STRUCTURES FOR PHOTONICS AND WATER APPLICATION. [Internet] [Doctoral dissertation]. Cornell University; 2018. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59343.

Council of Science Editors:

Zhang Q. BLOCK COPOLYMER DERIVED FUNCTIONAL NANOMATERIALS WITH THREE DIMENSIONAL POROUS STRUCTURES FOR PHOTONICS AND WATER APPLICATION. [Doctoral Dissertation]. Cornell University; 2018. Available from: http://hdl.handle.net/1813/59343

Cornell University

15. Cowman-Eggert, Christina. Synthesis Of Triblock Terpolymers Using Rapid Chain-Shuttling Polymerization And Synthesis Of Three-Component Polymer-Inorganic Hybrid Materials Derived From An Orthogonally-Degradable Triblock Terpolymer.

Degree: PhD, Chemistry and Chemical Biology, 2015, Cornell University

URL: http://hdl.handle.net/1813/39309

► Block copolymer self-assembly provides a template for the synthesis of nanostructured inorganic materials with applications in areas such as energy materials such as solar cells… (more)

Subjects/Keywords: Block Copolymers; Self-Assembly; Nanomaterials; Metal Deposition; Polymer Degradation

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APA (6^th Edition):

Cowman-Eggert, C. (2015). Synthesis Of Triblock Terpolymers Using Rapid Chain-Shuttling Polymerization And Synthesis Of Three-Component Polymer-Inorganic Hybrid Materials Derived From An Orthogonally-Degradable Triblock Terpolymer. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/39309

Chicago Manual of Style (16^th Edition):

Cowman-Eggert, Christina. “Synthesis Of Triblock Terpolymers Using Rapid Chain-Shuttling Polymerization And Synthesis Of Three-Component Polymer-Inorganic Hybrid Materials Derived From An Orthogonally-Degradable Triblock Terpolymer.” 2015. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/39309.

MLA Handbook (7^th Edition):

Cowman-Eggert, Christina. “Synthesis Of Triblock Terpolymers Using Rapid Chain-Shuttling Polymerization And Synthesis Of Three-Component Polymer-Inorganic Hybrid Materials Derived From An Orthogonally-Degradable Triblock Terpolymer.” 2015. Web. 24 Jan 2021.

Vancouver:

Cowman-Eggert C. Synthesis Of Triblock Terpolymers Using Rapid Chain-Shuttling Polymerization And Synthesis Of Three-Component Polymer-Inorganic Hybrid Materials Derived From An Orthogonally-Degradable Triblock Terpolymer. [Internet] [Doctoral dissertation]. Cornell University; 2015. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/39309.

Council of Science Editors:

Cowman-Eggert C. Synthesis Of Triblock Terpolymers Using Rapid Chain-Shuttling Polymerization And Synthesis Of Three-Component Polymer-Inorganic Hybrid Materials Derived From An Orthogonally-Degradable Triblock Terpolymer. [Doctoral Dissertation]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/39309

Cornell University

16. Iyer, Srikant. Development Of Bright Luminescent Silica Nanopartilces.

Degree: PhD, Chemistry and Chemical Biology, 2014, Cornell University

URL: http://hdl.handle.net/1813/36173

► Silica based luminescent nanoparticles provide tremendous potential as biocompatible and robust inorganic materials in nanobiotechnology and nanomedicine. Sol-gel derived silica act as excellent host for… (more)

Subjects/Keywords: Multiplexing; Chemiluminescence; Fluorescence correlation spectroscopy; Transient Absorption Spectroscopy

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APA (6^th Edition):

Iyer, S. (2014). Development Of Bright Luminescent Silica Nanopartilces. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/36173

Chicago Manual of Style (16^th Edition):

Iyer, Srikant. “Development Of Bright Luminescent Silica Nanopartilces.” 2014. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/36173.

MLA Handbook (7^th Edition):

Iyer, Srikant. “Development Of Bright Luminescent Silica Nanopartilces.” 2014. Web. 24 Jan 2021.

Vancouver:

Iyer S. Development Of Bright Luminescent Silica Nanopartilces. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/36173.

Council of Science Editors:

Iyer S. Development Of Bright Luminescent Silica Nanopartilces. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/36173

Cornell University

17. Agarwal, Praveen. Self-Suspended Nanoparticle Fluids.

Degree: PhD, Chemical Engineering, 2012, Cornell University

URL: http://hdl.handle.net/1813/31472

► This work undertakes the fundamental study of structure and dynamics of an entirely new class of organic-inorganic hybrid material created by densely grafting polymer chains… (more)

▼ This work undertakes the fundamental study of structure and dynamics of an entirely new class of organic-inorganic hybrid material created by densely grafting polymer chains to the nanoparticle surface. These systems can display fluid behavior even in the absence of any external solvent and have been termed as self-suspended nanoparticle fluids. This materials platform offers several technical opportunities and presents an entirely new system for fundamental studies. Nanoparticle volume fraction and tethered polymer molecular weight in this system can be changed in a straightforward way, allowing the structure and dynamics to be studied over a wide range. We have studied rheology, nanoparticle structure, tethered polymer dynamics and nanoparticle dynamics in this system to understand the governing interaction forces. Flow behavior has been studied by conventional steady and oscillatory shear rheology, nanoparticle structure has been studied by Small Angle X -ray Scattering (SAXS), tethered polymer dynamics has been studied by Broadband Dielectric Spectroscopy and Nanoparticle dynamics has been studied by X-ray Photon Correlation Spectroscopy (XPCS). We have discovered that these materials display characteristic rheological features of soft glassy materials and can be used as model systems to study soft colloidal glasses. In this work we have discovered several unexplored feature of soft glassy materials like the enhanced jamming with increasing temperature and accelerated dynamics with the application of shear strain. We have described our finding in the framework of soft glassy rheology (SGR) model. Tethered polymers in this system exhibit unexpected slow relaxation dynamics irrespective of their low molecular weight, which resembles the features observed in highly entangled polymers. We have proposed a simple theoretical framework to describe the relaxation dynamics of densely grafted polymers that captures the observed behavior. Nanoparticle dynamics in these materials exhibits slow and hyperdiffusive behavior, which follows the similar trends observed in rheology, indicating that the particle dynamics primarily governs the rheology. We have further extended this platform to create hybrid polymer networks having nanoparticles as junction points. These polymer networks exhibit unprecedented mechanical properties and display shape memory properties. Advisors/Committee Members: Archer, Lynden A. (chair), Wiesner, Ulrich B. (committee member), Koch, Donald L (committee member).

Subjects/Keywords: Polymer Nanocomposites; Slow dynamics; Soft glasses

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APA (6^th Edition):

Agarwal, P. (2012). Self-Suspended Nanoparticle Fluids. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/31472

Chicago Manual of Style (16^th Edition):

Agarwal, Praveen. “Self-Suspended Nanoparticle Fluids.” 2012. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/31472.

MLA Handbook (7^th Edition):

Agarwal, Praveen. “Self-Suspended Nanoparticle Fluids.” 2012. Web. 24 Jan 2021.

Vancouver:

Agarwal P. Self-Suspended Nanoparticle Fluids. [Internet] [Doctoral dissertation]. Cornell University; 2012. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/31472.

Council of Science Editors:

Agarwal P. Self-Suspended Nanoparticle Fluids. [Doctoral Dissertation]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/31472

Cornell University

18. Tu, Zhengyuan. STABILIZING ALKALI METAL ELECTRODEPOSITION VIA NANOSTRUCTURED HYBRID ELECTROLYTE AND INTERPHASE DESIGN FOR RECHARGEABLE METAL BASED BATTERIES.

Degree: PhD, Materials Science and Engineering, 2018, Cornell University

URL: http://hdl.handle.net/1813/59396

► Significant advances in the amount of electrical energy that can be stored in electrochemical cells, such as rechargeable batteries require the adoption of high energy… (more)

▼ Significant advances in the amount of electrical energy that can be stored in electrochemical cells, such as rechargeable batteries require the adoption of high energy metallic anodes including Li, Na, Al, Zn, etc. Such anodes introduce as significant technical challenges because they are known to form rough electrodeposits, loosely termed dendrites, during the device operation. This produces irreversible active material (electrode and electrolyte) losses during normal cell operation and poses safety concerns because the dendrites can proliferate in the inter-electrode space, shorting the cell internally. Though similar phenomenon has been investigated in the more conventional context of metal electroplating, more complex effects can dominate in a battery configuration especially at current densities below the limiting current and in cells where the metal anodes undergo chemical reaction with electrolyte components. In this thesis, a comprehensive materials strategy involving structural and interfacial engineering is pursued to stabilize lithium metal electrodeposition. The strategy is based on guidelines defined by a theoretical linear stability analysis of metal electrodeposition in structured electrolytes. The origin of deposition instability is revealed to involve fundamental features of electrolytes and interfaces near metal anodes, which lead to electro- convective, morphological and chemical instability. I show that the first two instabilities can be addressed by using a nanostructured polymer/ceramic hybrid electrolyte, which exhibits high conductivity, high modulus and the ability to rectify ion transport through confinement. The well-defined nanoporous structure of the electrolytes also confine the length scale of the electrodeposit, which allows surface tension and other weaker forces at the interface to flatten rough electrodeposits, promoting dendrite-free operation. The chemical instability poses a more serious challenge because it is intrinsic to the chemistry of the electrode and electrolyte components; any exposure of one to the other can in principle drive a reaction cascade that ends in unconstrained growth in the cell impedance and premature failure. I show that this challenge can be overcome by the careful design of solid electrolyte interphases (SEIs) that regulate mass transport of reactive electrolyte ingredients and at the same time are able to flex to accommodate volume expansion of the anode. A significant finding is that these features can be realized using electrolyte additives designed to selectively break-down in-situ to form SEI with explicit composition set by the chemistry of the additive. A particularly important example are additives that break down to form halogen salts, which exhibit low surface diffusion barrier and fast interfacial transport. Such materials are shown to be highly effective in improve battery cycle lifetime. A second category of SEI explored in the study are so- called artificial SEI formed by pretreating the metallic electrode with polymer, metals, and metal… Advisors/Committee Members: Archer, Lynden A. (chair), Wiesner, Ulrich B. (committee member), Kourkoutis, Lena Fitting (committee member).

Subjects/Keywords: dendrites; Energy; Materials Science; alkali metals; lithium batteries; rechargeable batteries; electrodeposition

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APA (6^th Edition):

Tu, Z. (2018). STABILIZING ALKALI METAL ELECTRODEPOSITION VIA NANOSTRUCTURED HYBRID ELECTROLYTE AND INTERPHASE DESIGN FOR RECHARGEABLE METAL BASED BATTERIES. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59396

Chicago Manual of Style (16^th Edition):

Tu, Zhengyuan. “STABILIZING ALKALI METAL ELECTRODEPOSITION VIA NANOSTRUCTURED HYBRID ELECTROLYTE AND INTERPHASE DESIGN FOR RECHARGEABLE METAL BASED BATTERIES.” 2018. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59396.

MLA Handbook (7^th Edition):

Tu, Zhengyuan. “STABILIZING ALKALI METAL ELECTRODEPOSITION VIA NANOSTRUCTURED HYBRID ELECTROLYTE AND INTERPHASE DESIGN FOR RECHARGEABLE METAL BASED BATTERIES.” 2018. Web. 24 Jan 2021.

Vancouver:

Tu Z. STABILIZING ALKALI METAL ELECTRODEPOSITION VIA NANOSTRUCTURED HYBRID ELECTROLYTE AND INTERPHASE DESIGN FOR RECHARGEABLE METAL BASED BATTERIES. [Internet] [Doctoral dissertation]. Cornell University; 2018. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59396.

Council of Science Editors:

Tu Z. STABILIZING ALKALI METAL ELECTRODEPOSITION VIA NANOSTRUCTURED HYBRID ELECTROLYTE AND INTERPHASE DESIGN FOR RECHARGEABLE METAL BASED BATTERIES. [Doctoral Dissertation]. Cornell University; 2018. Available from: http://hdl.handle.net/1813/59396

Cornell University

19. Lin, Debra. Development Of In Vitro Models To Examine Cell-Mineral Interaction And Cell-Mediated Mineral Formation.

Degree: PhD, Materials Science and Engineering, 2013, Cornell University

URL: http://hdl.handle.net/1813/33845

► The development of hard tissues such as bone and teeth are examples of biomineralization processes in which organisms actively direct mineralization. The formation of hard… (more)

▼ The development of hard tissues such as bone and teeth are examples of biomineralization processes in which organisms actively direct mineralization. The formation of hard tissues is a highly regulated process involving the coordination of extracellular matrix production by the cells and the mineralization of the matrix network regulated by proteins secreted by the cells. The formation of these tissues follows a sequence of events in a spatial and temporal manner dictated by cellular processes. In addition to the cells involved in the formation and remodeling of hard tissues, such as osteoblasts (OBs) and osteoclasts (OCs) in bone, other cell-types, such as breast and prostate tumor cells, can interact with bone. Two strategies were taken in this thesis to understand how cells are involved in the mineralization process. Cell culture systems were designed to examine cell-mineral interactions or to examine cell-mediated mineral formation. Chapter 1 discusses the requirements for sustaining cell viability and function as well as the various components involved in designing cell culture systems such as cell source, culture method, and mineral source. Culture systems to study cell-mineral interactions require an environment containing the mineral of interest for cells to be cultured upon. Hydroxyapatite (Ca10(PO4)6(OH)2, HA) is the main mineral component of bone and has been noted to change in size, shape, and crystallinity with age, anatomical location, and disease progression. Chapter 2 describes a two-step method for synthesizing hydroxyapatite nanoparticles with controlled shape, size, and crystallinity in order to evaluate how differences in HA crystal properties can affect cellular response. Three culture systems were developed and described in this work. Two systems were developed to utilize the synthetic hydroxyapatite nanoparticles (prepared in Chap. 2) for examining cell-mineral interactions. In Chapter 3, dry-annealed synthetic and commercial HA particles were combined with polylactide(co-glycolide) (PLG) and spin-coated onto glass substrates to form a film of PLG-HA to examine how changes in crystallinity can affect OB attachment and matrix production. Chapter 4 describes the integration of a series of hydrothermally aged HA nanoparticles into porous PLG scaffolds to examine breast cancer cell response to various HA nanoparticles with discrete sizes. Finally, Chapter 5 details the third system designed for culturing cells in a 3-D gel system that allows for the presence of 1-D gradients to study cell-mediated mineral formation with articular chondrocytes. Due to the breadth of components involved, designing culture systems for mineralization studies are complex and selection of cell source, culture method, and mineral source should be dictated by research questions of interest of particular aspects of these processes (Chapter 1). Chapter 2 demonstrates how controlling for reactant salts, reactant concentration, reaction duration, and reaction volume in the initial precipitation step leads to changes in… Advisors/Committee Members: Estroff, Lara A. (chair), Boskey, Adele (committee member), Wiesner, Ulrich B. (committee member).

Subjects/Keywords: Biomineralization; Hydroxyapatite; Cell Culture

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APA (6^th Edition):

Lin, D. (2013). Development Of In Vitro Models To Examine Cell-Mineral Interaction And Cell-Mediated Mineral Formation. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33845

Chicago Manual of Style (16^th Edition):

Lin, Debra. “Development Of In Vitro Models To Examine Cell-Mineral Interaction And Cell-Mediated Mineral Formation.” 2013. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/33845.

MLA Handbook (7^th Edition):

Lin, Debra. “Development Of In Vitro Models To Examine Cell-Mineral Interaction And Cell-Mediated Mineral Formation.” 2013. Web. 24 Jan 2021.

Vancouver:

Lin D. Development Of In Vitro Models To Examine Cell-Mineral Interaction And Cell-Mediated Mineral Formation. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/33845.

Council of Science Editors:

Lin D. Development Of In Vitro Models To Examine Cell-Mineral Interaction And Cell-Mediated Mineral Formation. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33845

Cornell University

20. Dorin, Rachel. Non-Equilibrium Triblock Terpolymer Structures As Ultrafiltration Membranes.

Degree: PhD, Materials Science and Engineering, 2013, Cornell University

URL: http://hdl.handle.net/1813/34072

► Block copolymers are promising as materials for ultrafiltration membranes due to their ability to self-assemble into periodic, ordered structures on length scales of ~550 nm.… (more)

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APA (6^th Edition):

Dorin, R. (2013). Non-Equilibrium Triblock Terpolymer Structures As Ultrafiltration Membranes. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/34072

Chicago Manual of Style (16^th Edition):

Dorin, Rachel. “Non-Equilibrium Triblock Terpolymer Structures As Ultrafiltration Membranes.” 2013. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/34072.

MLA Handbook (7^th Edition):

Dorin, Rachel. “Non-Equilibrium Triblock Terpolymer Structures As Ultrafiltration Membranes.” 2013. Web. 24 Jan 2021.

Vancouver:

Dorin R. Non-Equilibrium Triblock Terpolymer Structures As Ultrafiltration Membranes. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/34072.

Council of Science Editors:

Dorin R. Non-Equilibrium Triblock Terpolymer Structures As Ultrafiltration Membranes. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/34072

Cornell University

21. Kahn, Jason. Engineering DNA Gels For Cell-Free Protein Production.

Degree: PhD, Agricultural and Biological Engineering, 2014, Cornell University

URL: http://hdl.handle.net/1813/38845

► One of the fundamental goals of biological engineering is the harnessing of biological systems to produce desired products. Protein production of exogenous proteins in living… (more)

▼ One of the fundamental goals of biological engineering is the harnessing of biological systems to produce desired products. Protein production of exogenous proteins in living cells has long been a staple of molecular biology. However, living biological systems present fundamental limitations as the scientists' desire to produce more complex and varying molecules in cells competes with normal cell processes. Ideally, one can isolate the required cell pathway away from the living system in order to explore the full range of possible molecular permutations allowed by chemistry without the limitations of biology. In vitro protein production allows life's central dogma to be performed outside the confines of a cell, creating the possibility of producing toxic proteins and testing full mutation spaces in the DNA-RNA-Protein pathway. This possibility also opens up the need for materials to interface with genes and protein in an in vitro platform. Our lab has engineered a DNA gel that interacts with the gene-of-interest to increase protein yields while protecting the gene from degradation. DNA has long been investigated as a genetic material, but only in the pat decade has its vast potential as a generic polymer been elucidated. Beyond its monodispersity, the specificity of binding interactions in Watson-Crick base-pairing allows a unique level of control over structure and material organization at the nanoscale. In creating networked DNA structures that can incorporate genes into the gel network, we create protein-producing gels. However, further engineering of DNA gels is required in order to produce a system more comparable to the morphology and functionality of a cell, notably the isolation of gene sets and the ability to connect genotype and phenotype when testing protein activity. This thesis work discusses methods to create cell-size DNA gels that possess the ability to both produce and capture protein, practical considerations for DNA manipulation in cell-free protein production, and provides insight into further functionalization of DNA gels to provide more diverse applications in the context of protein engineering. Advisors/Committee Members: Luo, Dan (chair), Wiesner, Ulrich B. (committee member), March, John C (committee member).

Subjects/Keywords: DNA; Hydrogel; Protein Expression

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APA (6^th Edition):

Kahn, J. (2014). Engineering DNA Gels For Cell-Free Protein Production. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/38845

Chicago Manual of Style (16^th Edition):

Kahn, Jason. “Engineering DNA Gels For Cell-Free Protein Production.” 2014. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/38845.

MLA Handbook (7^th Edition):

Kahn, Jason. “Engineering DNA Gels For Cell-Free Protein Production.” 2014. Web. 24 Jan 2021.

Vancouver:

Kahn J. Engineering DNA Gels For Cell-Free Protein Production. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/38845.

Council of Science Editors:

Kahn J. Engineering DNA Gels For Cell-Free Protein Production. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/38845

Cornell University

22. Schwartz, Evan. Advanced Materials For Next-Generation Lithography: Self-Assembling Block Copolymers And Inorganic Nanoparticle Photoresists.

Degree: PhD, Materials Science and Engineering, 2011, Cornell University

URL: http://hdl.handle.net/1813/33519

► The constant demand for increased circuit density and higher resolution patterning calls for simultaneous advancements in materials chemistry. A variety of possible approaches for next-generation… (more)

▼ The constant demand for increased circuit density and higher resolution patterning calls for simultaneous advancements in materials chemistry. A variety of possible approaches for next-generation lithography are explored, centering on the use of directly patternable self-assembling block copolymers, along with hafnium oxidebased nanoparticle photoresists. In one example of the first approach, a random copolymer brush layer of poly(styrene-ran-hydroxystyrene) was designed and synthesized to precisely tune the substrate/polymer surface energy for a lithographically patternable poly([alpha]methylstyrene-block-4-hydroxystyrene) (P[alpha]MS-b-PHOST) block copolymer. The surface was designed to avoid preferential wetting of either P[alpha]MS or PHOST domains to the substrate and orient the block copolymer domains vertically relative to the substrate. To neutralize the polymer/ vapor interface during solvent vapor processing, the film was exposed to a mixed solvent vapor of a defined polarity, creating vertical microdomains with long-range order. In the latter approach, hafnium oxide nanoparticles were covalently coated with a photo-reactive ligand, which allowed neighboring nanoparticles to form a crosslinked network upon exposure to ultraviolet light. The basic science of this new class of resist material is discussed. These negative-tone resists have so far demonstrated sub-50 nm resolution using 193nm interference lithography, and plasma etch resistance over thirteen times greater than PHOST under standard silicon etching conditions. In a combination of the two approaches, the co-assembly of the inorganic nanoparticles with the PHOST phase of P[alpha]MS-b-PHOST is shown. TEM and SAXS studies indicated the expansion of the microdomain periodicity upon nanoparticle incorporation. These block copolymer nanocomposite films offer enhanced functionality and a larger process window for subsequent pattern transfer into semiconductor substrates. In another example of co-assembly, phenolic molecular glass photoresists were blended with low molecular weight, triblock copolymer surfactants based on poly(ethylene oxide)(PEO). The miscibility of these blend components is shown to be a result of preferential hydrogen bonding between the hydroxyl groups attached to the molecular glass and the alkyl ether group of the PEO block, as shown by FTIR and DSC analysis. The blending resulted in an enhancement in segregation strength that led to the formation of sub-10nm self-assembled morphologies, as verified by SAXS. Options for the lithographic patterning of these blends are explored. Lastly, a combined additive and subtractive patterning technique is demonstrated that allows the deposition of multiple block copolymer films, of different domain sizes and pitches, on the same layer of the substrate. The approach used a semifluorinated negative-tone photoresist which is designed to resist intermixing when spin coated on top of a block copolymer film. Advisors/Committee Members: Ober, Christopher Kemper (chair), Wiesner, Ulrich B. (committee member), Sogah, Dotsevi Y (committee member).

Subjects/Keywords: block copolymers; self-assembly; photolithography; molecular glass; nanoparticles; co-assembly

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APA (6^th Edition):

Schwartz, E. (2011). Advanced Materials For Next-Generation Lithography: Self-Assembling Block Copolymers And Inorganic Nanoparticle Photoresists. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33519

Chicago Manual of Style (16^th Edition):

Schwartz, Evan. “Advanced Materials For Next-Generation Lithography: Self-Assembling Block Copolymers And Inorganic Nanoparticle Photoresists.” 2011. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/33519.

MLA Handbook (7^th Edition):

Schwartz, Evan. “Advanced Materials For Next-Generation Lithography: Self-Assembling Block Copolymers And Inorganic Nanoparticle Photoresists.” 2011. Web. 24 Jan 2021.

Vancouver:

Schwartz E. Advanced Materials For Next-Generation Lithography: Self-Assembling Block Copolymers And Inorganic Nanoparticle Photoresists. [Internet] [Doctoral dissertation]. Cornell University; 2011. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/33519.

Council of Science Editors:

Schwartz E. Advanced Materials For Next-Generation Lithography: Self-Assembling Block Copolymers And Inorganic Nanoparticle Photoresists. [Doctoral Dissertation]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/33519

Cornell University

23. Robbins, Spencer. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides.

Degree: PhD, Chemistry and Chemical Biology, 2015, Cornell University

URL: http://hdl.handle.net/1813/39425

► Controlling the structure of inorganic materials on the mesoscale (2-50 nm) is desirable for many applications and can influence the materials' properties and performance in… (more)

Subjects/Keywords: block copolymers; mesoporous materials; metal nitrides

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APA (6^th Edition):

Robbins, S. (2015). Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/39425

Chicago Manual of Style (16^th Edition):

Robbins, Spencer. “Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides.” 2015. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/39425.

MLA Handbook (7^th Edition):

Robbins, Spencer. “Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides.” 2015. Web. 24 Jan 2021.

Vancouver:

Robbins S. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides. [Internet] [Doctoral dissertation]. Cornell University; 2015. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/39425.

Council of Science Editors:

Robbins S. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides. [Doctoral Dissertation]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/39425

Cornell University

24. Alvarado, Shaun Javier. QUALITATIVE HPLC ANALYSIS OF PEPTIDE FUNCTIONALIZED FLUORESCENT SILICA-NANOPARTICLES FOR APPLICATIONS IN NANOMEDICINE.

Degree: M.S., Chemical Engineering, Chemical Engineering, 2017, Cornell University

URL: http://hdl.handle.net/1813/47753

► Functionalized nanoparticles are widely used for various medical applications, defined as nanomedicine. Notwithstanding, surface functionalization remains poorly understood. Distributions of surface ligands per particle are… (more)

Subjects/Keywords: peptide ligands; silica nanoparticles; surface ligands; Materials Science; Nanotechnology; Nanoscience; HPLC; nanostructures; PEG

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APA (6^th Edition):

Alvarado, S. J. (2017). QUALITATIVE HPLC ANALYSIS OF PEPTIDE FUNCTIONALIZED FLUORESCENT SILICA-NANOPARTICLES FOR APPLICATIONS IN NANOMEDICINE. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/47753

Chicago Manual of Style (16^th Edition):

Alvarado, Shaun Javier. “QUALITATIVE HPLC ANALYSIS OF PEPTIDE FUNCTIONALIZED FLUORESCENT SILICA-NANOPARTICLES FOR APPLICATIONS IN NANOMEDICINE.” 2017. Masters Thesis, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/47753.

MLA Handbook (7^th Edition):

Alvarado, Shaun Javier. “QUALITATIVE HPLC ANALYSIS OF PEPTIDE FUNCTIONALIZED FLUORESCENT SILICA-NANOPARTICLES FOR APPLICATIONS IN NANOMEDICINE.” 2017. Web. 24 Jan 2021.

Vancouver:

Alvarado SJ. QUALITATIVE HPLC ANALYSIS OF PEPTIDE FUNCTIONALIZED FLUORESCENT SILICA-NANOPARTICLES FOR APPLICATIONS IN NANOMEDICINE. [Internet] [Masters thesis]. Cornell University; 2017. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/47753.

Council of Science Editors:

Alvarado SJ. QUALITATIVE HPLC ANALYSIS OF PEPTIDE FUNCTIONALIZED FLUORESCENT SILICA-NANOPARTICLES FOR APPLICATIONS IN NANOMEDICINE. [Masters Thesis]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/47753

Cornell University

25. Song, Ju Ho. Nanostructure Formation Of Inorganic Materials From The Self-Assembly Of Highly Amphiphilic Block Copolymers.

Degree: PhD, Chemical Engineering, 2012, Cornell University

URL: http://hdl.handle.net/1813/31065

► High performance catalysts or energy devices such as solar cells and batteries which involve reactions and transport problems require nanostructured functional materials that are highly… (more)

▼ High performance catalysts or energy devices such as solar cells and batteries which involve reactions and transport problems require nanostructured functional materials that are highly ordered mesoporous and crystalline materials. The self-assembly based structure direction of functional inorganic materials by block copolymers (BCPs) is a promising route because it combines mesoporosity at the 2-50 nm length scale, high surface areas and full control over morphology. This work explored solubility design guidelines that facilitate the coassembly of titania and poly(isoprene-b-ethylene oxide) (PI-b-PEO) which is a highly amphiphilic block copolymer. This approach enabled the fabrication of highly ordered crystalline titania. The pore size control of mesoporous crystalline titania was also accomplished by applying different molecular weight PI-bPEOs, and the highly ordered titania with the largest cylindrical pores (>30 nm) was reported without the use of pore-expanders. Nanostructured titania membranes were developed for water purification applications based on the knowledge from the previous part because inorganic membranes have superior thermal and chemical stabilities over polymer membranes. The mesoporous titania membranes with different pore size were successfully fabricated on porous disc substrates from both large and small molar mass PI-b-PEOs and presented an excellent molecular weight cut-off performances with high permeability, which would provide a huge potential to be applied in many ultrafiltration areas due to its self-cleaning characteristics from the photocatalytic activity. Finally, an ABC triblock terpolymer system was studied as an extension of the BCP self-assembly based structure direction of inorganic materials because these terpolymers allow wider composition windows for ordered network structures that have advantages such as 3-D connectivity and enhanced mechanical properties. In this work, the ternary morphology map of PI-b-PS-b-PEO and aluminisolicate sols was successfully constructed, which reveals 10 distinct morphologies along with particularly wide composition windows (2-13 vol%) for ordered network morphologies. This morphology map could be used as a model to predict the structure direction of other functional inorganic materials and a highly ordered network titania composite with core-shell double gyroid structure (cs-GD) was demonstrated as an example. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Disalvo, Francis J (committee member), Joo, Yong L. (committee member).

Subjects/Keywords: block copolymer self-assembly; inorganic materials; nanostructures

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

APA (6^th Edition):

Song, J. H. (2012). Nanostructure Formation Of Inorganic Materials From The Self-Assembly Of Highly Amphiphilic Block Copolymers. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/31065

Chicago Manual of Style (16^th Edition):

Song, Ju Ho. “Nanostructure Formation Of Inorganic Materials From The Self-Assembly Of Highly Amphiphilic Block Copolymers.” 2012. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/31065.

MLA Handbook (7^th Edition):

Song, Ju Ho. “Nanostructure Formation Of Inorganic Materials From The Self-Assembly Of Highly Amphiphilic Block Copolymers.” 2012. Web. 24 Jan 2021.

Vancouver:

Song JH. Nanostructure Formation Of Inorganic Materials From The Self-Assembly Of Highly Amphiphilic Block Copolymers. [Internet] [Doctoral dissertation]. Cornell University; 2012. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/31065.

Council of Science Editors:

Song JH. Nanostructure Formation Of Inorganic Materials From The Self-Assembly Of Highly Amphiphilic Block Copolymers. [Doctoral Dissertation]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/31065

Cornell University

26. Hendrick, Erin. Stimuli-Responsive Electrospun Fibers.

Degree: PhD, Fiber Science, 2011, Cornell University

URL: http://hdl.handle.net/1813/30649

► Stimuli-responsive fibers were created by incorporating pH-sensitive nanoparticles into electrospun cellulose acetate (CA) and poly(lactic acid) (PLA) fibers. The fluorescent silica nanoparticles, Cornell dots (C… (more)

▼ Stimuli-responsive fibers were created by incorporating pH-sensitive nanoparticles into electrospun cellulose acetate (CA) and poly(lactic acid) (PLA) fibers. The fluorescent silica nanoparticles, Cornell dots (C dots), have both a fluorescent core (518 nm emission), and a fluorescent pH-sensitive shell (572 nm emission). Using confocal microscopy, the signaling effectiveness of these fibers was studied by varying several parameters: fiber diameter, substrate, and surface hydrophilicity. For the CA fibers, fiber diameter was varied by changing the feed rate during the electrospinning process to 0.03 mL/hr, 0.30 mL/hr and 0.30 mL/min, producing fibers with average diameters of 1.1 [MICRO SIGN]m, 1.8 [MICRO SIGN]m and 9.5 [MICRO SIGN]m, respectively. It was found that fibers with larger surface area had a greater sensitivity to pH change than fibers with smaller surface area. The response of the pH-sensitive fibers also varied when both the nanoparticles and CA fibers were applied/electrospun onto the surface of four different substrates: optical glass slides, cotton, cotton/polyester, and nylon/spandex fabrics. Fibers spun onto glass slides and cotton/polyester showed an improvement in sensitivity to pH change, while the cotton and nylon/spandex samples were greatly influenced by the chemistry inherent to these substrates. Poly(lactic acid) - b - poly(ethylene glycol) (PLA-b-PEG) copolymers with block lengths of 1000-750, 5000-1000 and 1000-5000 and bulk PEG were added to PLA electrospinning dopes to create hydrophilic but non-water soluble nanofibers. PLA-b-PEG block lengths strongly affected the total amount of PEG that could be incorporated, spinnability and fiber morphology. Solutions containing >1% w/w of the lowest molecular weight copolymer PLA (1000) - b - PEG (750) formed an unspinnable, cloudy gel. Addition of the PLA (5000) - b - PEG (1000) to the base spinning solution influenced fiber diameters and spinnability in the same manner as simply increasing PLA concentration in the spinning dope. Addition of PLA (1000) - b - PEG (5000) resulted in decreased fiber diameters, and allowed for the highest overall copolymer loading. In final fiber formulations, maximums of 0.9, 2.9 and 9.3 wt% PEG could be added to the fibers using the PLA-b-PEG 1000-750, 5000-1000 and 1000-5000 respectively. PEG (MW = 3350 g/mol) homopolymer was added to the spinning dopes to result in 1.0 and 5.0 wt% PEG in the final fibers. These spinning dopes were electrospun with more non-uniform and variable morphology and diameter size than occurred with the addition of PEG in block copolymer form. Water absorbance by electrospun nonwoven fabrics increased by four times over the control PLA with the addition of 1.0 wt% PEG, and by eighteen times with the addition of 9.3 wt% PEG with the block copolymers. At similar overall PEG loadings, the addition of PLA-b-PEG resulted in a two to four fold increase in water wicking over the addition of PEG homopolymer. The improvement in water wicking was mirrored in the pH-measurement data compiled for… Advisors/Committee Members: Frey, Margaret W (chair), Baeumner, Antje J (committee member), Wiesner, Ulrich B. (committee member).

Subjects/Keywords: Electrospinning; pH sensing; Wettability

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

APA (6^th Edition):

Hendrick, E. (2011). Stimuli-Responsive Electrospun Fibers. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/30649

Chicago Manual of Style (16^th Edition):

Hendrick, Erin. “Stimuli-Responsive Electrospun Fibers.” 2011. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/30649.

MLA Handbook (7^th Edition):

Hendrick, Erin. “Stimuli-Responsive Electrospun Fibers.” 2011. Web. 24 Jan 2021.

Vancouver:

Hendrick E. Stimuli-Responsive Electrospun Fibers. [Internet] [Doctoral dissertation]. Cornell University; 2011. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/30649.

Council of Science Editors:

Hendrick E. Stimuli-Responsive Electrospun Fibers. [Doctoral Dissertation]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/30649

Cornell University

27. Sai, Hiroaki. Structural Complexities In Synthetic Self-Assembling Nanomaterials.

Degree: PhD, Materials Science and Engineering, 2013, Cornell University

URL: http://hdl.handle.net/1813/33861

► Self-assembly of amphiphilic molecules such as surfactants and amphiphilic block copolymers (BCPs), provides an energy-efficient bottom-up approach for controllably creating structures at the mesoscale (2-50… (more)

▼ Self-assembly of amphiphilic molecules such as surfactants and amphiphilic block copolymers (BCPs), provides an energy-efficient bottom-up approach for controllably creating structures at the mesoscale (2-50 nm) with potential applications in catalysis, next-generation energy production and storage devices, optical metamaterials and bioengineered materials. Biological systems serve as examples of complex materials at mesoscopic length scales that integrate structural and compositional heterogeneities that lead to functions including toughness, optical iridescence and van der Waals adhesion due to large surface area. In this dissertation, I will describe three different approaches for adding structural complexity to synthetic mesoscale structures. Firstly, controlled synthesis and detailed characterization of multicompartment mesoporous silica nanoparticles (multi-MSNs) from surfactant coassembly with sol-gel silica is described. These multi-MSNs consist of a core with cage-like cubic mesoporous network morphology and up to four fingers/branches with hexagonally packed cylindrical mesopores epitaxially emanating from the vertices of the cubic core. These multi-MSNs are mesoscale structural analogues to branched semiconductor nanocrystals. Possible nucleation and growth processes leading to this particle morphology are discussed. Secondly, multicomponent evaporation-induced self-assembly behavior of ligand-stabilized platinum nanoparticles (Pt NPs) with poly(isoprene-block-dimethylaminoethyl methacrylate) block copolymers is discussed. Detailed characterization on Pt NPs revealed sparse ligand coverage. Changing the volume fraction of Pt NPs in BCP-NP composites yielded organic-inorganic hybrids with spherical micellar, wormlike micellar, lamellar and inverse hexagonal mesoscale morphologies. Disassembly of hybrids with spherical, wormlike micellar, and lamellar morphologies generated isolated metal-NP based nanospheres, cylinders and sheets, respectively. Results suggest the existence of powerful design criteria for the formation of metal-based nanostructures from designer blocked macromolecules. Finally, a facile synthesis protocol for hierarchically structured polymeric scaffolds with highly ordered mesopores is introduced. Mixtures of poly(styrene-block-ethylene oxide) BCPs with oligomeric poly(ethylene oxide) additives were dissolved in high boiling point solvents, and bulk films were cast through solvent evaporation. Spinodal decomposition of the BCP/additive mixture resulted in macrostructure formation, with the BCP-rich domains forming ordered mesostructures. Facile washing of the films resulted in the formation of macro/meso-porous three-dimensional polymer scaffolds. Experimental parameters relevant for structure formation including additive molecular weights, solvents and drying temperatures are explored. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Estroff, Lara A. (committee member), Gruner, Sol Michael (committee member).

Subjects/Keywords: Self-assembly; Nanostructure; Structure-directing agents

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APA (6^th Edition):

Sai, H. (2013). Structural Complexities In Synthetic Self-Assembling Nanomaterials. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33861

Chicago Manual of Style (16^th Edition):

Sai, Hiroaki. “Structural Complexities In Synthetic Self-Assembling Nanomaterials.” 2013. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/33861.

MLA Handbook (7^th Edition):

Sai, Hiroaki. “Structural Complexities In Synthetic Self-Assembling Nanomaterials.” 2013. Web. 24 Jan 2021.

Vancouver:

Sai H. Structural Complexities In Synthetic Self-Assembling Nanomaterials. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/33861.

Council of Science Editors:

Sai H. Structural Complexities In Synthetic Self-Assembling Nanomaterials. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33861

Cornell University

28. An, Duo. DESIGNING ADVANCED CELL ENCAPSULATION SYSTEMS FOR TYPE 1 DIABETES (T1D) TREATMENT.

Degree: PhD, Biological and Environmental Engineering, 2018, Cornell University

URL: http://hdl.handle.net/1813/59498

► Type 1 diabetes (T1D) is an autoimmune disease in which the patient’s own immune system attacks and destroys the insulin-producing beta cells in the pancreas.… (more)

▼ Type 1 diabetes (T1D) is an autoimmune disease in which the patient’s own immune system attacks and destroys the insulin-producing beta cells in the pancreas. It is estimated that in the US alone there are as many as three million people with T1D, with approximately 80 newly diagnosed patients every day. One in every 400 children and adolescents in the US has T1D and the rate of T1D incidence among children under the age of 14 is estimated to increase by 3% annually worldwide. Current treatments include injections and infusion of exogenous insulin and require constant attention and strict patient compliance. The transplantation of pancreases or islets offers a better alternative. However, its wide application is limited by the need for long-term immunosuppression and a persistent shortage of donor organs. Cell encapsulation has been shown to hold promise for effective, long-term treatment of T1D. However, encapsulation systems developed to date still face various challenges. For example, alginate hydrogel capsules, despite their biocompatibility and function, are difficult to retrieve or replace completely due to the large number of capsules required for effective treatment and the complicated organ structures in the transplantation site (i.e. peritoneal space), contributing to risks and concerns in case of transplant failure or medical complications. On the other hand, macroscopic devices (e.g. planar diffusion chambers), although considered retrievable, are challenging to scale up to a clinically relevant capacity due to their small surface area for mass transfer. In this thesis, I present three independent yet correlated research projects developing advanced cell encapsulation systems. Firstly, I developed a novel method to fabricate toroidal particles. Alginate hydrogel toroidal particles have a shorter diffusion path within compared to conventional spherical alginate hydrogel particles, facilitating mass transport and benefiting encapsulated cells. Secondly, to enhance the mechanical robustness of the hydrogel and prevent cells from escaping, I engineered a novel nanofiber-enabled encapsulation device by combining electrospun nanofibers with biocompatible hydrogel. Last but not least, to further push cell encapsulation therapies toward clinical applications, I designed a retrievable and scalable device. I demonstrated the therapeutic potential of the device through the correction of chemically induced diabetes in C57BL/6 mice using rat islets for 3 months as well as in immunodeficient SCID-Beige mice using human islets for 4 months. I further showed, as a proof of concept, the scalability and retrievability of the device in dogs. In general, these projects may contribute to a cellular therapy for T1D. Advisors/Committee Members: Luo, Dan (chair), Wiesner, Ulrich B. (committee member), Ma, Minglin (committee member).

Subjects/Keywords: Materials Science; Biomedical engineering; cell encapsulation; cell transplantation; diabetes; medical device; Bioengineering

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

APA (6^th Edition):

An, D. (2018). DESIGNING ADVANCED CELL ENCAPSULATION SYSTEMS FOR TYPE 1 DIABETES (T1D) TREATMENT. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59498

Chicago Manual of Style (16^th Edition):

An, Duo. “DESIGNING ADVANCED CELL ENCAPSULATION SYSTEMS FOR TYPE 1 DIABETES (T1D) TREATMENT.” 2018. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59498.

MLA Handbook (7^th Edition):

An, Duo. “DESIGNING ADVANCED CELL ENCAPSULATION SYSTEMS FOR TYPE 1 DIABETES (T1D) TREATMENT.” 2018. Web. 24 Jan 2021.

Vancouver:

An D. DESIGNING ADVANCED CELL ENCAPSULATION SYSTEMS FOR TYPE 1 DIABETES (T1D) TREATMENT. [Internet] [Doctoral dissertation]. Cornell University; 2018. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59498.

Council of Science Editors:

An D. DESIGNING ADVANCED CELL ENCAPSULATION SYSTEMS FOR TYPE 1 DIABETES (T1D) TREATMENT. [Doctoral Dissertation]. Cornell University; 2018. Available from: http://hdl.handle.net/1813/59498

Cornell University

29. Suteewong, Teeraporn. Synthesis, Characterization And Structure Control Of Ordered Mesoporous Silica Nanoparticles.

Degree: PhD, Materials Science and Engineering, 2011, Cornell University

URL: http://hdl.handle.net/1813/33635

► Ordered mesoporous silica materials are characterized by uniform and tunable pore size, high surface area and large pore volume. In particular, nano-sized ordered mesoporous silica… (more)

▼ Ordered mesoporous silica materials are characterized by uniform and tunable pore size, high surface area and large pore volume. In particular, nano-sized ordered mesoporous silica particles have drawn interest from several fields, including biorelated areas, because silica is benign, possesses chemical stability and can be integrated with other materials. Structural aspects, such as pore connectivity, geometry and pore size are known to govern materials performance. Extensive efforts have been devoted to synthesize mesoporous silica particles with different structures, functionalities and sizes. In contrast, only a small number of studies so far have concentrated on the formation mechanism of these particles. This is hence the focus of the present dissertation. The first part reports on the synthesis and characterization of ordered mesoporous silica nanoparticles with and without embedded magnetic nanoparticles. The formation mechanism of silica nanocomposites is investigated by capturing particle formation at different time points during the synthesis. A combination of transmission electron microscopy (TEM) and small angle x-ray scattering (SAXS) is used to characterize the structure evolution of resulting materials. Incorporating organic moieties into the silica matrix provides additional functionalities to ordered mesoporous silica nanoparticles. However, it often leads to disordered pore structure or pore blockage. The second part demonstrates the preparation of aminated and ordered mesoporous silica nanoparticles using a cocondensation method. Increasing the amount of aminosilane in the synthesis feed causes a structural transition of organically modified particles from hexagonal to cubic. Pore size of ordered mesoporous silica and aminated ordered mesoporous silica nanoparticles can be tailored by the addition of a swelling agent during the synthesis. The structural transformation from hexagonal to cubic is also observed in the latter case, albeit at different amino silane concentrations. The final part reports on the internalization of nanoparticles into cells. Fluorescent aminated mesoporous silica nanoparticles are first prepared and then coated with poly(ethylene glycol) to improve particle stability and lower protein adsorption. Dye-labeled aminated mesoporous silica nanoparticles are spontaneously internalized by cells. Advisors/Committee Members: Wiesner, Ulrich B. (chair), Liddell, Chekesha M (committee member), Baird, Barbara Ann (committee member).

Subjects/Keywords: Mesoporous; Silica; Nanoparticles

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

APA (6^th Edition):

Suteewong, T. (2011). Synthesis, Characterization And Structure Control Of Ordered Mesoporous Silica Nanoparticles. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33635

Chicago Manual of Style (16^th Edition):

Suteewong, Teeraporn. “Synthesis, Characterization And Structure Control Of Ordered Mesoporous Silica Nanoparticles.” 2011. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/33635.

MLA Handbook (7^th Edition):

Suteewong, Teeraporn. “Synthesis, Characterization And Structure Control Of Ordered Mesoporous Silica Nanoparticles.” 2011. Web. 24 Jan 2021.

Vancouver:

Suteewong T. Synthesis, Characterization And Structure Control Of Ordered Mesoporous Silica Nanoparticles. [Internet] [Doctoral dissertation]. Cornell University; 2011. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/33635.

Council of Science Editors:

Suteewong T. Synthesis, Characterization And Structure Control Of Ordered Mesoporous Silica Nanoparticles. [Doctoral Dissertation]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/33635

Cornell University

30. Susca, Ethan. Self-Assembly of Triblock Terpolymer/Preceramic Blends and the Preparation of Macroscopic Doubld Gyroid Mesophase Single Crystals.

Degree: PhD, Materials Science and Engineering, 2018, Cornell University

URL: http://hdl.handle.net/1813/59743

► The synthesis of single crystal materials spanning macroscopic dimensions has enabled the fundamental understanding of structure-property relationships that have spurred revolutions in fields such as… (more)

▼ The synthesis of single crystal materials spanning macroscopic dimensions has enabled the fundamental understanding of structure-property relationships that have spurred revolutions in fields such as microelectronics, optics, and energy conversion. Block copolymers form ordered assemblies at length scales between that of molecular and colloidal crystals. Self-assembly occurs by confined phase separation, where two or more polymers, covalently bound to each other, fill their miscibility gap with ordered morphologies containing periodicities on the length scale of the polymer chain, roughly 10-100 nm. While the type of morphology and periodicity can be exquisitely controlled, only the simplest of self-assembled morphologies have been successfully prepared as "mesophase" single crystals with coherent periodic domains spanning macroscopic distances. This dissertation focuses on the complex ordered network structure known as the double gyroid (space group230, Ia3d), which is prepared by the coassembly of a triblock terpolymer, poly(isoprene)-b-poly(styrene)-b-poly(dimethylaminoethylmethacrylate) (PS-b-PS-b-PDMAEMA, or simply ISA), blended with an oligomeric ceramic precursor, poly(methyl-vinyl-silazane) (PMVS). For the first time, this structure is assembled into single crystal domains that can be identified by eye and easily isolated for further study. These gyroid mesophase crystals span up to 14 mm2, more than three orders of magnitude larger than previously reported. These gyroid nanocomposites are characterized primarily with small angle x-ray scattering (SAXS) and electron microscopy. Importantly, the ISA/PMVS blends can be converted to ordered porous single crystal ceramic monoliths retaining the double gyroid morphology past 1100 ˚C, which can subsequently be used as templates for the infiltration of materials with specific functionality (e.g. superconductors). These mesophase single crystals are needed to realize angle-dependent and emergent properties predicted by theory/simulation such as negative refractive index. This dissertation begins with an introduction (Chapter 1) discussing classical nucleation theory and block copolymer thermodynamics. Chapter 2 documents the first preparation of the double gyroid morphology from ISA/PMVS blends and their transformation to a double gyroid mesoporous ceramic. Chapter 3 describes the preparation and characterization of double gyroid mesophase single crystals. Chapter 4 examines the behavior of the ISA/PMVS morphology diagram beyond the compositions previously studied. The conclusion (Chapter 5) suggests future experiments to expand upon findings reported in Chapters 2-4. Advisors/Committee Members: Estroff, Lara A. (chair), Coates, Geoffrey (committee member), Wiesner, Ulrich B. (committee member).

Subjects/Keywords: Physics; Materials Science; block copolymer; Gyroid; Preceramic; Single Crystal; Polymer chemistry; Self-assembly

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

APA (6^th Edition):

Susca, E. (2018). Self-Assembly of Triblock Terpolymer/Preceramic Blends and the Preparation of Macroscopic Doubld Gyroid Mesophase Single Crystals. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59743

Chicago Manual of Style (16^th Edition):

Susca, Ethan. “Self-Assembly of Triblock Terpolymer/Preceramic Blends and the Preparation of Macroscopic Doubld Gyroid Mesophase Single Crystals.” 2018. Doctoral Dissertation, Cornell University. Accessed January 24, 2021. http://hdl.handle.net/1813/59743.

MLA Handbook (7^th Edition):

Susca, Ethan. “Self-Assembly of Triblock Terpolymer/Preceramic Blends and the Preparation of Macroscopic Doubld Gyroid Mesophase Single Crystals.” 2018. Web. 24 Jan 2021.

Vancouver:

Susca E. Self-Assembly of Triblock Terpolymer/Preceramic Blends and the Preparation of Macroscopic Doubld Gyroid Mesophase Single Crystals. [Internet] [Doctoral dissertation]. Cornell University; 2018. [cited 2021 Jan 24]. Available from: http://hdl.handle.net/1813/59743.

Council of Science Editors:

Susca E. Self-Assembly of Triblock Terpolymer/Preceramic Blends and the Preparation of Macroscopic Doubld Gyroid Mesophase Single Crystals. [Doctoral Dissertation]. Cornell University; 2018. Available from: http://hdl.handle.net/1813/59743

Open Access Theses and Dissertations