Index Catalog // ScholarsArchive@OSU

Evaluation of Materials for Use in Open-Cycle Magnetohydrodynamic Power Generation

Creator:: Bowen, Michael S.
Abstract:: Recent interest in oxy-fuel combustion for carbon capture, as well as advancements in technologies such as magnetics, materials, and computational modeling has sparked renewed interest in magnetohydrodynamic (MHD) power generation. The increased temperatures of oxy-fuel combustion versus air-fuel combustion poses a challenge in the selection of materials for plasma exposed...
Resource Type:: Masters Thesis
Full Text:: commercial Chemical Equilibrium with Applications (CEA) software developed by McBride and Gordon with NASA

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
Full Text:: , Jeremy Anderson, Mike Hruschka, Cheol-hee Park, Mike Shoemaker, Melinda M. Valencia, Randy L. Hoffman

On the Properties and Characteristics of Solution Processed Hafnium Based Thin-Films from Aqueous Precursors

Creator:: Decker, Shawn R.
Abstract:: Aqueous hydroxo Hf nanoclusters enable studies to identify and codify steps in the deposition of Hf-based oxide thin films from solution precursors. HfOCl2 reacts with combinations of H2O2(aq), acids, and TMAH to produce polymetal species at high pH and low pH. X-ray scattering and spectroscopic methods reveal the nature of...
Resource Type:: Dissertation
Full Text:: 2.6 TPD-MS response for mass 30, NO(g)…………………………………… 17 2.7 XRD for films annealed at various

New luminescent materials and high-performance solution-processed oxide thin films

Creator:: Jiang, Kai
Abstract:: Crystals of an incongruent-melting compound, Ba₃MgSi₂O₈, were grown by the flux method and its structure was determined by single crystal X-ray diffraction methods. Ba₃MgSi₂O₈ crystallizes in trigonal space group P-3[bar]m1 with a = 5.6123(3) Å, c = 7.2667(9) Å and Z = 1. Eu²⁺ ions prefer one crystallographic Ba site...
Resource Type:: Dissertation
Full Text:: ............................... 87 5.9 Cross-sectional SEM images of (a) the g(HL)4Ha distributed Bragg reflector and

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
Full Text:: .....................................................................48 2.2 Reaction of epoxides with catalytic LReO3/PPh3 (L = Tp', Tk) ........ 54 3.1 Solvent effects

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
Full Text:: discussions. I specially thank Dr. Sangmoon Park, Dr. Jennifer L. Stone-Sundberg, Dr. Ning Ye, Jeremy

High Temperature Electrical Properties of Ceria-Based Ceramics for Use as Electrodes in Magnetohydrodynamic Power Generators

Creator:: Bowen, Michael S.
Abstract:: Determining the electrical properties of ceria-based materials is important for their use as electrodes in hot-wall magnetohydrodynamic (MHD) power generators with wall temperatures greater than 1500 ̊C. The electrical conductivity of a material can be used in models for predicting the performance of generator designs. More specifically, the temperature dependent...
Resource Type:: Dissertation
Full Text:: –60. https://doi.org/10.1016/j.pecs.2003.08.003. (11) Rudins, G.; Schneider, S.; Bates, L.; Bowen

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, structure and properties of some transition metal oxides

Creator:: Li, Jun
Abstract:: See pdf
Resource Type:: Dissertation
Full Text:: 3.3 BET surface area (m2/g) of ZnO samples prepared by decomposition of zinc peroxide at different

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
Full Text:: ijkd χ= (1.2.8) Making the identifications 1 2 3 4 5 6 11 22 33 23,32 13,31 12,21 l jk

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
Full Text:: THz opteAzE ωεωω τ ωω (1.2.5) Nonlinear medium 0 L z 14 Where 0A is a constant. I use

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
Full Text:: [48, 49, 50] l Longitudinal effective mass t Transverse effective mass 9 2.1.2 Amorphous oxide

Structure-property Relationships of Transition Metal Oxides Containing Precious Metals

Creator:: Hapuraja Pathirannehelage, Vidhara H. P.
Abstract:: This dissertation presents a study of structure-property relationships within 3d/4d metal oxides containing precious metals through detailed structure refinements using high-resolution neutron and X-ray diffraction data along with exploration of the resultant properties. Oxides of 4d or 5d transition metals tend to show new topological phases due to significant spin-orbit...
Resource Type:: Dissertation
Full Text:: ............... 154 A.7: L*a*b* parameters of Bi12Mn-xTixO20 series

Electronic and Optical Properties of Defects in Amorphous Oxide and Transition Metal Dichalcogenide Semiconductors

Creator:: Vogt, Kyle
Abstract:: The optical and electronic properties of amorphous oxide thin films depend crucially on chemical composition, and deposition process variations which give rise to sub-gap defect states. Consequently, there is a need for a reliable, high-throughput method to extract sub-gap defect densities of states in amorphous oxide thin films. We present...
Resource Type:: Dissertation
Full Text:: circuits. This was famously observed in a 1965 article written by Gordon Moore, a co-founder at Intel

Development of bi-based lead-free piezoelectric materials : thin film piezoelectric materials via PVD and CSD routes

Creator:: Jeon, Yu Hong
Abstract:: Piezoelectric materials have been widely used in electromechanical actuators, sensors, and ultrasonic transducers. Among these materials, lead zirconate titanate Pb(Zr[subscript 1‐x]Ti[subscript x])O₃ (PZT) has been primarily investigated due to its excellent piezoelectric properties. However, environmental concerns due to the toxicity of PbO have led to investigations into alternative materials systems....
Resource Type:: Dissertation

First principles studies of optical, electronic and mechanical properties of organic molecules and solids

Creator:: Barras, Faye Lyn
Abstract:: This thesis presents the results of quantum-mechanical first principles calculations of optical, electronic and mechanical properties of organic molecules and solids, which have diverse potential applications such as photovoltaics, flexible electronics, and mechanical catalysts with applications in force sensors and self-healing materials. The electronic and optoelectronic properties of organic thin...
Resource Type:: Dissertation
Full Text:: the same level. Note that the activation energy, ∆G‡, will increase as the spacing between xR,0 and

ScholarsArchive@OSU

Evaluation of Materials for Use in Open-Cycle Magnetohydrodynamic Power Generation

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

On the Properties and Characteristics of Solution Processed Hafnium Based Thin-Films from Aqueous Precursors

New luminescent materials and high-performance solution-processed oxide thin films

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

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

High Temperature Electrical Properties of Ceria-Based Ceramics for Use as Electrodes in Magnetohydrodynamic Power Generators

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

Synthesis, structure and properties of some transition metal oxides

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

Generation and manipulation of THz waves

Development of oxide semiconductors : materials, devices, and integration

Structure-property Relationships of Transition Metal Oxides Containing Precious Metals

Electronic and Optical Properties of Defects in Amorphous Oxide and Transition Metal Dichalcogenide Semiconductors

Development of bi-based lead-free piezoelectric materials : thin film piezoelectric materials via PVD and CSD routes

First principles studies of optical, electronic and mechanical properties of organic molecules and solids

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