Index Catalog // ScholarsArchive@OSU

Design, fabrication and application of a microfluidic nanofiltration module for separation and purification of macromolecules and nanoparticles

Creator:: Rundel, Jack T.
Abstract:: A microfluidic nanofiltration module has been designed, fabricated and applied to the continuous-flow, pressure-driven, post-synthetic purification of macromolecules and nanoparticles via diafiltration using a commercially available organic solvent resistant nanofiltration membrane, STARMEM 122. This module will readily interface with other microscale components within a "nanofactory" for the rapid synthesis, purification...
Resource Type:: Dissertation

Development of oxide semiconductors : materials, devices, and integration

Creator:: Chiang, Hai Q.
Abstract:: The aim of this dissertation is to develop oxide semiconductors by radio-frequency sputtering for thin-film transistor (TFT) applications. A variety of oxide semiconductors are used as the TFT channel layer, including indium gallium oxide (IGO), zinc tin oxide (ZTO), and indium gallium zinc oxide (IGZO). The variety of materials used...
Resource Type:: Dissertation

DNA binding and beyond : an investigation of proteins involved in PAH-induced carcinogesesis

Creator:: Hooven, Louisa Ada
Abstract:: Exposure to polycyclic aromatic hydrocarbons such as benzo[a]pyrene (B[a]P) has been determined to be a risk factor for various forms of human cancer. PAH DNA adducts have been shown to cause mutations, but carcinogenesis is also accompanied by alterations in gene expression. Inhibiting individual cytochrome P450s could clarify the interaction...
Resource Type:: Dissertation

Electroluminescent and photoluminescent phosphor development and a facile approach to synthesis of refractory silicates at low temperatures

Creator:: Clark, Benjamin L.
Resource Type:: Dissertation

Generation and manipulation of THz waves

Creator:: Amer, Naaman
Abstract:: In this thesis I studied several THz components that can be used for potential THz technology. THz waves were generated in nonlinear medium via optical rectification of femtosecond optical pulses. Utilizing the phase matching condition between the optical and THz waves in a ZnTe crystal, single-cycle broad-band THz pulses were...
Resource Type:: Dissertation

Generation of narrowband THz pulses and THz studies of ultrafast phenomena in semiconductor quantum wells

Creator:: Danielson, Jeremy R.
Abstract:: This work comprises two main parts: creating and shaping narrowband, pulsed THz radiation in a table-top optical setup; and applying THz pulses to semiconductor nanostructures to study electron dynamics. I developed a scheme to shape the THz output of a fanned-out periodically poled lithium niobate (PPLN) crystal. The pulses are...
Resource Type:: Dissertation

Hartree-Fock electronic structure calculations forfree atoms and immersed atoms in an electron gas

Creator:: Walsh, Kenneth Charles
Abstract:: Electronic structure calculations for free and immersed atoms are performed in the context of unrestricted Hartree-Fock Theory. Spherical symmetry is broken, lifting de-generacies in electronic conﬁgurations involving the magnetic quantum number m. Basis sets, produced from density functional theory, are then explored for completeness. Com-parison to spectroscopic data is done...
Resource Type:: Dissertation

High quantum-yield phosphors via quantum splitting and upconversion

Creator:: Jeong, Joayoung
Abstract:: The Gd3+ ion has been used to induce quantum splitting in luminescent materials by using cross-relaxation energy transfer (CRET). In Nd:LiGdF4, quantum splitting results from a two-step CRET between Gd3+ and Nd3+, first involving a transition 6G→6I on Gd3+ and an excitation within the 4f3 configuration of Nd3+ followed by...
Resource Type:: Dissertation

Monte Carlo simulations of magnetic semiconducting Superlattices

Creator:: Scott, Silas Menlo
Abstract:: Computer simulations invoking the Metropolis Algorithm and Monte Carlo techniques were constructed to model the behavior ofvarious systems of magnetic semiconductors. Among the systems modeled were bulk type II FCC antiferromagnets and simple cubic thin films and superlattices. Studies of bulk antiferromagnets revealed dependence of Neel Temperature on nearest neighbor...
Resource Type:: Dissertation

On the photoresponse of several novel oligoacene and anthradithiophene derivatives

Creator:: Day, Jonathan
Abstract:: The results of an investigation into carrier dynamics in several novel functionalized and solution-processable pentacene and anthradithiophene derivatives are reported. Measurements were made of real-time photoresponse of polycrystalline thin films of these materials to ultrafast laser pulses, on picosecond to microsecond time-scales, as well as measurements of dark current and...
Resource Type:: Dissertation

Rhenium-catalyzed oxygen-atom transfer reactions : mechanism and applications

Creator:: Brown, Eric C.
Abstract:: In situ reduction of hydrido-tris-(3,5-dimethylpyrazolyl)borato(trioxo) rhenium(V) with triphenylphosphine or triethylphosphite leads to a reactive rhenium(V) species that catalytically deoxygenates epoxides at 75-105°C. The reaction is stereospecific, except for trans- and cis-butene oxide which formed minor amounts of the opposite isomer. A variety of different functional groups were tolerated and even...
Resource Type:: Dissertation

Synthesis and function of bioactive, block copolymer surfactant constructs as relevant to the preparation of anticoagulant and antibacterial medical implant surfaces.

Creator:: Joshi, Pranav R.
Abstract:: Nisin, an antibacterial peptide proven to be an effective inhibitor of Gram-positive bacteria, was incorporated into novel block copolymer constructs and tested for retained antibacterial activity. Covalent coupling was achieved by chemical modification of the N-terminal isoleucine to introduce a thiol group. Thiolated nisin derivatives were then linked to poly[ethylene...
Resource Type:: Dissertation

Synthesis and study of oxides and chalcogenides : thin films and crystals

Creator:: Park, Sangmoon
Abstract:: Several types of solid-state inorganic materials are prepared and characterized. By using the SILAR (Successive Ionic Layer Adsorption and Reaction) deposition method in conjunction with hydrothermal dehydration both low-temperature deposition and crystallization of oxide thin films are achieved. Various aspects of new transparent p-type materials are studied by examining both...
Resource Type:: Dissertation

Synthesis and study of transparent p- and n-type semiconductors and luminescent materials

Creator:: Park, Cheol-Hee
Abstract:: New transparent p- and n-type semiconductors and luminescent materials have been prepared and characterized. Synthesis, structures, optical and electrical properties of new chalcogenide fluoride p-type transparent semiconductors MCuQF (M=Ba, Sr; Q=S, Se, Te) are described. Band-gap tuning and improvement in conductivity through p-type doping are demonstrated in the family. The...
Resource Type:: Dissertation

Synthesis, structure and properties of some transition metal oxides

Creator:: Li, Jun
Abstract:: See pdf
Resource Type:: Dissertation

Wide band gap semiconductors and insulators : synthesis, processing and characterization

Creator:: Hersh, Peter A.
Abstract:: The work presented here is focused on applying basic principles of solid-state chemistry to the study and development of new wide band-gap semiconductors and insulators for photovoltaic and electronic-device applications. Analysis of crystal structure, band structure, optical band gap, morphology and transport properties provides fundamental insight into materials performance as...
Resource Type:: Dissertation

ScholarsArchive@OSU

Design, fabrication and application of a microfluidic nanofiltration module for separation and purification of macromolecules and nanoparticles

Development of oxide semiconductors : materials, devices, and integration

DNA binding and beyond : an investigation of proteins involved in PAH-induced carcinogesesis

Electroluminescent and photoluminescent phosphor development and a facile approach to synthesis of refractory silicates at low temperatures

Generation and manipulation of THz waves

Generation of narrowband THz pulses and THz studies of ultrafast phenomena in semiconductor quantum wells

Hartree-Fock electronic structure calculations forfree atoms and immersed atoms in an electron gas

High quantum-yield phosphors via quantum splitting and upconversion

Monte Carlo simulations of magnetic semiconducting Superlattices

On the photoresponse of several novel oligoacene and anthradithiophene derivatives

Rhenium-catalyzed oxygen-atom transfer reactions : mechanism and applications

Synthesis and function of bioactive, block copolymer surfactant constructs as relevant to the preparation of anticoagulant and antibacterial medical implant surfaces.

Synthesis and study of oxides and chalcogenides : thin films and crystals

Synthesis and study of transparent p- and n-type semiconductors and luminescent materials

Synthesis, structure and properties of some transition metal oxides

Wide band gap semiconductors and insulators : synthesis, processing and characterization

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