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Georgia Tech
1.
Bryant, Jonathan James.
Oligo(ethylene glycol) chains: applications and advancements in biosensing.
Degree: MS, Chemistry and Biochemistry, 2010, Georgia Tech
URL: http://hdl.handle.net/1853/37147 
► Oligo(ethylene glycol) groups have been used as substituents in poly(p-phenyleneethynylene)s (PPEs) to provide solubility, and to boost quantum yield. Properties such as water-solubility and increased…
(more)
▼ Oligo(ethylene glycol) groups have been used as substituents in poly(p-phenyleneethynylene)s (PPEs) to provide solubility, and to boost quantum yield. Properties such as water-solubility and increased quantum yield in aqueous solution make these conjugated systems promising for biosensory applications.
In this thesis, a PPE containing a branched ethylene glycol side chain is synthesized as part of a polymer array for glycan biosensing. I also report that the same side chain can be put to use in a red-emissive polymer to lend water solubility. Another monomeric unit, containing ethylene glycol chains, is incorporated into a PPE to create an ampiphilic polymer. The versatility of these polymers allows them to be used for a variety of purposes, some of which will be described herein.
Advisors/Committee Members: Uwe Bunz (Committee Chair), David Collard (Committee Member), Stefan France (Committee Member).
Subjects/Keywords: Ethylene glycol; Biosensing; Biosensors; Conjugated polymers; Electronics Materials; Fluorescent polymers
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APA (6th Edition):
Bryant, J. J. (2010). Oligo(ethylene glycol) chains: applications and advancements in biosensing. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/37147
Chicago Manual of Style (16th Edition):
Bryant, Jonathan James. “Oligo(ethylene glycol) chains: applications and advancements in biosensing.” 2010. Masters Thesis, Georgia Tech. Accessed January 21, 2021.
http://hdl.handle.net/1853/37147.
MLA Handbook (7th Edition):
Bryant, Jonathan James. “Oligo(ethylene glycol) chains: applications and advancements in biosensing.” 2010. Web. 21 Jan 2021.
Vancouver:
Bryant JJ. Oligo(ethylene glycol) chains: applications and advancements in biosensing. [Internet] [Masters thesis]. Georgia Tech; 2010. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/1853/37147.
Council of Science Editors:
Bryant JJ. Oligo(ethylene glycol) chains: applications and advancements in biosensing. [Masters Thesis]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/37147
Georgia Tech
2.
Englert, Brian Carl.
Jacketed and Functionalized Poly(paraphenyleneethynylene)s: Nonaggregating Conjugated Polymers and Materials Functionalized Through Click-Chemistry.
Degree: PhD, Chemistry and Biochemistry, 2005, Georgia Tech
URL: http://hdl.handle.net/1853/7102
► The synthesis and investigation of new types of poly(paraphenyleneethynylene)s, PPEs, is presented. PPEs which are Jacketed are there by shielded from electronic and plararization effects…
(more)
▼ The synthesis and investigation of new types of poly(paraphenyleneethynylene)s, PPEs, is presented. PPEs which are Jacketed are there by shielded from electronic and plararization effects in the solid state. Other PPEs contain pendent groups which may functionalized before or after polymerization to afford two versitle routes to newly functionalized polymeric materials. Based on the PPE structure, metals may be introduced and these polymers may be used as precursors for other types of materials such as ceramics.
Advisors/Committee Members: Uwe Bunz (Committee Chair), Anselm Griffin (Committee Member), David Collard (Committee Member), Joseph Perry (Committee Member), Laren Tolbert (Committee Member).
Subjects/Keywords: Poly(paraphenyleneethynylene)s
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APA (6th Edition):
Englert, B. C. (2005). Jacketed and Functionalized Poly(paraphenyleneethynylene)s: Nonaggregating Conjugated Polymers and Materials Functionalized Through Click-Chemistry. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/7102
Chicago Manual of Style (16th Edition):
Englert, Brian Carl. “Jacketed and Functionalized Poly(paraphenyleneethynylene)s: Nonaggregating Conjugated Polymers and Materials Functionalized Through Click-Chemistry.” 2005. Doctoral Dissertation, Georgia Tech. Accessed January 21, 2021.
http://hdl.handle.net/1853/7102.
MLA Handbook (7th Edition):
Englert, Brian Carl. “Jacketed and Functionalized Poly(paraphenyleneethynylene)s: Nonaggregating Conjugated Polymers and Materials Functionalized Through Click-Chemistry.” 2005. Web. 21 Jan 2021.
Vancouver:
Englert BC. Jacketed and Functionalized Poly(paraphenyleneethynylene)s: Nonaggregating Conjugated Polymers and Materials Functionalized Through Click-Chemistry. [Internet] [Doctoral dissertation]. Georgia Tech; 2005. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/1853/7102.
Council of Science Editors:
Englert BC. Jacketed and Functionalized Poly(paraphenyleneethynylene)s: Nonaggregating Conjugated Polymers and Materials Functionalized Through Click-Chemistry. [Doctoral Dissertation]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/7102
Georgia Tech
3.
Foston, Marcus Bernard.
Cyclic, tethered and nanoparticulate silicones for material modification.
Degree: PhD, Polymer, Textile and Fiber Engineering, 2008, Georgia Tech
URL: http://hdl.handle.net/1853/24762
► I have examined three different topological forms of a material modifier. The modifier is silicone and the three topological forms are cyclic, linear tethers and…
(more)
▼ I have examined three different topological forms of a material modifier. The modifier is silicone and the three topological forms are cyclic, linear tethers and networked siloxane bonds in the form of a nanoparticulate. Often silicones, or siloxanes, are added to a material because of its unique properties that are related to its inorganic or inorganic-organic hybrid character.
This dissertation addresses either the synthesis of silicones for material modification or the effect of the adding silicones to a variety of substrates and polymeric systems.
Chapters 2 and 3 present research focused on the first topological form, cyclic PDMS. The synthesis of cyclic polymers is very important to the synthesis and subsequent characterization of cyclic containing multi-component materials. Cyclic PDMS is formed via ring-chain depolymerization and bimolecular coupling and the unique issues associated with the formation, purification and analysis of cyclic polymer topologies. The goal of the work described in these chapters was to find a straightforward high-yield route to form large cycles of PDMS in a relatively high purity.
Chapter 4 focuses on the modification of the next topological form, linear polymers as tethers for surface modification and presents a novel concept for surface-modifying compounds; the incorporation of an ionic-reactive functionality into PDMS is presented. The idea being its ionic character will increase affinity for the surface, surface coverage and levelness, while the subsequent reactive fixation will permanently modify the surface to improve retention and fastness. The use of such chemistry has not been applied for surface modification protocols.
Chapters 5, 6 and 7 discuss the characterization of systems with the third topological form incorporated. They include differences in the viscoelastic behavior of PVAc/silica nanocomposites and the neat PVAc matrix, relating those differences to polymer dynamics and structure as determined by several solid-state NMR experiments. The latter two chapters pertain to PVAc/silica nanocomposites with PDMS surface treatments. Specifically, evaluating how polymer dynamics and structure changes particularly at the interfaceinterphase with various PDMS surface treatments having different topologies at the surface.
Advisors/Committee Members: Dr. Haskell W. Beckham (Committee Chair), Dr. Anselm Griffin (Committee Member), Dr. Johannes Leisen (Committee Member), Dr. Sankar Nair (Committee Member), Dr. Uwe Bunz (Committee Member).
Subjects/Keywords: Cyclic PDMS; Ionic-reactive; Surface-modifying compounds; PVAc/silica nanocomposites; Solid-state NMR; Silicones Synthesis; Nanostructured materials; Composite materials; Polymeric composites
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APA (6th Edition):
Foston, M. B. (2008). Cyclic, tethered and nanoparticulate silicones for material modification. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/24762
Chicago Manual of Style (16th Edition):
Foston, Marcus Bernard. “Cyclic, tethered and nanoparticulate silicones for material modification.” 2008. Doctoral Dissertation, Georgia Tech. Accessed January 21, 2021.
http://hdl.handle.net/1853/24762.
MLA Handbook (7th Edition):
Foston, Marcus Bernard. “Cyclic, tethered and nanoparticulate silicones for material modification.” 2008. Web. 21 Jan 2021.
Vancouver:
Foston MB. Cyclic, tethered and nanoparticulate silicones for material modification. [Internet] [Doctoral dissertation]. Georgia Tech; 2008. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/1853/24762.
Council of Science Editors:
Foston MB. Cyclic, tethered and nanoparticulate silicones for material modification. [Doctoral Dissertation]. Georgia Tech; 2008. Available from: http://hdl.handle.net/1853/24762
Georgia Tech
4.
McRae, Reagan.
Investigating metal homeostasis in mammalian cells using high resolution imaging techniques.
Degree: PhD, Chemistry and Biochemistry, 2010, Georgia Tech
URL: http://hdl.handle.net/1853/41197
► The primary aim of the work presented in this thesis is to elucidate novel information regarding the uptake, storage, distributions, and functions of both copper…
(more)
▼ The primary aim of the work presented in this thesis is to elucidate novel information regarding the uptake, storage, distributions, and functions of both copper and zinc in mammalian cells by predominantly using a combination of the high resolution imaging modalities, synchrotron radiation X-ray fluorescence microscopy (SXRF) and standard fluorescence imaging. Results from studies using cell permeable, metal ion selective fluorescent probes suggested the presence of labile pools of copper and zinc localized within the mitochondria and Golgi apparatus. Furthermore, SXRF imaging of a cell line defective in the copper transporter, Atox1, revealed intriguing differences in the Cu distribution of Atox1-/- cells compared to the corresponding wild-type cells. Finally, spatially well-resolved SXRF elemental maps of single, adherent mouse cells revealed remarkable changes in the distributions of both zinc and copper as the cells progressed through the cell cycle. Taken together, findings suggested major roles for copper and zinc within a native biological setting.
Advisors/Committee Members: Christoph J. Fahrni (Committee Chair), Donald Doyle (Committee Member), Jake Soper (Committee Member), Nael A. McCarty (Committee Member), Uwe Bunz (Committee Member).
Subjects/Keywords: Microscopy; Imaging; Synchrotron based X-ray fluorescence; Copper; Zinc; Synchrotron radiation
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APA ·
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APA (6th Edition):
McRae, R. (2010). Investigating metal homeostasis in mammalian cells using high resolution imaging techniques. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/41197
Chicago Manual of Style (16th Edition):
McRae, Reagan. “Investigating metal homeostasis in mammalian cells using high resolution imaging techniques.” 2010. Doctoral Dissertation, Georgia Tech. Accessed January 21, 2021.
http://hdl.handle.net/1853/41197.
MLA Handbook (7th Edition):
McRae, Reagan. “Investigating metal homeostasis in mammalian cells using high resolution imaging techniques.” 2010. Web. 21 Jan 2021.
Vancouver:
McRae R. Investigating metal homeostasis in mammalian cells using high resolution imaging techniques. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/1853/41197.
Council of Science Editors:
McRae R. Investigating metal homeostasis in mammalian cells using high resolution imaging techniques. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/41197
Georgia Tech
5.
Roberson, Luke Bennett.
Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells.
Degree: PhD, Chemistry and Biochemistry, 2005, Georgia Tech
URL: http://hdl.handle.net/1853/7629
► The objective of this work is to understand how the thin film characteristics of p-type organic and polymer semiconductors affect their electronic properties in microelectronic…
(more)
▼ The objective of this work is to understand how the thin film characteristics of p-type organic and polymer semiconductors affect their electronic properties in microelectronic applications. To achieve this goal, three main objectives were drawn out: (1) to create single-crystal organic field-effect transistors and measure the intrinsic charge carrier mobility, (2) to develop a platform for measuring and depositing polymer thin films for organic field-effect transistors, and (3) to deposit polythiophene thin films for inorganic-organic hybrid solar cells and determine how thin film properties effect device performance.
Pentacene single-crystal field-effect transistors (OFETs) were successfully manufactured on crystals grown via horizontal vapor-phase reactors designed for simultaneous ultrapurification and crystal growth. These OFETs led to calculated pentacene field-effect mobility of 2.2 cm2/Vs. During the sublimation of pentacene at atmospheric pressure, a pentacene disporportionation reaction was observed whereby pentacene reacted with itself to form a peripentacene, a 2:1 cocrystal of pentacene:6,13-dihydropentacene and 6,13-dihydropentacene. This has led to the proposal of a possible mechanism for the observed disproportionation reaction similar to other polyaromatic hydrocarbons, which may be a precursor for explaining the formation of graphite.
Several silicon-based and PET-based field-effect transistor platforms were developed for the measurement of mobility of materials in the thin film state. These platforms were critically examined against one another and the single-crystal devices in order to determine the optimal device design for highest possible mobility data, both theoretically based on silicon technology and commercially based on individual devices on flexible substrates. Novel FET device designs were constructed with a single gate per device on silicon and PET as well as the commonly used common-gate device. It was found that the deplanarization effects and poor gate insulator quality of the individual gate devices led to lower overall performance when compared to the common gate approach; however, good transistor behavior was observed with field modulation.
Additionally, these thin films were implemented into inorganic-organic hybrid and purely organic solid-state photovoltaic cells. A correlation was drawn between the thin film properties of the device materials and the overall performance of the device. It was determined that each subsequent layer deposited on the device led to a planarization effect, and that the more pristine the individual layer, the better device performance. The hybrid cells performed at VOC = 0.8V and JSC = 55A/cm2.
Advisors/Committee Members: Laren Tolbert (Committee Chair), Art Janata (Committee Member), David Collard (Committee Member), Marcus Weck (Committee Member), Mohan Srinivasarao (Committee Member), Uwe Bunz (Committee Member).
Subjects/Keywords: Transistors; Thin films; Solar cells; OFET; Organic semiconductors; Field-effect transistors; Thin film transistors; Solar cells
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APA ·
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APA (6th Edition):
Roberson, L. B. (2005). Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/7629
Chicago Manual of Style (16th Edition):
Roberson, Luke Bennett. “Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells.” 2005. Doctoral Dissertation, Georgia Tech. Accessed January 21, 2021.
http://hdl.handle.net/1853/7629.
MLA Handbook (7th Edition):
Roberson, Luke Bennett. “Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells.” 2005. Web. 21 Jan 2021.
Vancouver:
Roberson LB. Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells. [Internet] [Doctoral dissertation]. Georgia Tech; 2005. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/1853/7629.
Council of Science Editors:
Roberson LB. Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells. [Doctoral Dissertation]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/7629
Georgia Tech
6.
Shotwell, Sandra Leigh.
Synthesis and Characterization of ortho-Phenyleneethynylenes and Diphenylamine Polymers.
Degree: PhD, Chemistry and Biochemistry, 2006, Georgia Tech
URL: http://hdl.handle.net/1853/10449
► In the first part of this thesis, the synthesis, characterization and investigation of ortho-phenyleneethynylenes containing heterocycles, are presented. These compounds display changes in absorption and…
(more)
▼ In the first part of this thesis, the synthesis, characterization and investigation of ortho-phenyleneethynylenes containing heterocycles, are presented. These compounds display changes in absorption and emission spectra varying with their functionalization and size. These compounds also have the ability to coordinate with metals. The synthesis of coordination compounds and their crystallographic data are reported. The synthesis and characterization of tetraethynyl thiophene compounds containing pyridines are also presented. These compounds exhibit differences in absorption and emission spectra upon exposure to various metal salts. The final topic to be discussed is the synthesis and characterization of diphenyl amine polymers. These polymers could in principle be used in NLO applications or light emitting devices.
Advisors/Committee Members: Dr. Uwe Bunz (Committee Chair), Dr. Anselm Griffin (Committee Member), Dr. David Collard (Committee Member), Dr. Joseph Perry (Committee Member), Dr. Laren Tolbert (Committee Member).
Subjects/Keywords: Polymers; Thiophenes Synthesis; Pyridinium compounds Synthesis; Ligands; Diphenylamine Synthesis; Oligomers
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APA ·
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APA (6th Edition):
Shotwell, S. L. (2006). Synthesis and Characterization of ortho-Phenyleneethynylenes and Diphenylamine Polymers. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/10449
Chicago Manual of Style (16th Edition):
Shotwell, Sandra Leigh. “Synthesis and Characterization of ortho-Phenyleneethynylenes and Diphenylamine Polymers.” 2006. Doctoral Dissertation, Georgia Tech. Accessed January 21, 2021.
http://hdl.handle.net/1853/10449.
MLA Handbook (7th Edition):
Shotwell, Sandra Leigh. “Synthesis and Characterization of ortho-Phenyleneethynylenes and Diphenylamine Polymers.” 2006. Web. 21 Jan 2021.
Vancouver:
Shotwell SL. Synthesis and Characterization of ortho-Phenyleneethynylenes and Diphenylamine Polymers. [Internet] [Doctoral dissertation]. Georgia Tech; 2006. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/1853/10449.
Council of Science Editors:
Shotwell SL. Synthesis and Characterization of ortho-Phenyleneethynylenes and Diphenylamine Polymers. [Doctoral Dissertation]. Georgia Tech; 2006. Available from: http://hdl.handle.net/1853/10449
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