Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"organic precursors"”.
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Chemical vapor deposition of copper, copper(I) oxide, and silver from metal-organic precursors
Metal-organic chemical vapor deposition (MOCVD) from the tetrameric precursor copper(I) tert-butoxide, (Cu(O-t-Bu)) $\sb4$, results in the deposition of pure copper(I) oxide whiskers at 510 K and of copper metal with $\sim$2% oxygen contamination at 670 K. Quantitative analyses of the gaseous …
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Indium-based thiospinels via solid-state pyrolysis of metal-organic precursors for water splitting and supercapacitance
… from dithiocarbamate and xanthate molecular precursors is outlined. Experimental results showed that the best energy storage activities were achieved with NiIn2S4 synthesized from the xanthate mixture through the colloidal route, which presented the highest Csp of 40 F/g at a current density …
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Sinter-patterning of oxide dielectric and high critical transition temperature films by pulsed neodymium:YAG laser
Using metallo-organic precursors formulated based on metal carboxylates, various oxide dielectric films (ZrO$\sb2$, Y$\sb2$O$\sb3$ yttria stabilized zirconium (YSZ)), perovskite based oxide films (BaTiO$\sb3$, SrTiO$\sb3$, CaTiO$\sb3$, YBa$\sb2$Cu$\sb3$O$\sb{\rm 7-x}$), and …
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Chemical vapor deposition of organosilicon and sacrificial polymer thin films
… applications from a variety of organosilicon and organic precursors. The structure and properties of thin films were controlled by varying processing conditions such as the method and power of precursor activation, pressure, flow rates, and substrate temperature. Systematic variance of deposition …
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Removal of dissolved organic matter from surface waters by coagulation with trivalent iron
… were investigated to determine the types of organic compounds removed by coagulation and settling. The distribution of organic precursors that react with chlorine to form organic halide compounds was also determined, along with the reaction rates. DOC removal by coagulation was size …
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Novel Synthesis of Bulk Nanocarbon (BNC)
Carbonized organic precursors such as wood, shells and some plant seeds are very porous. They are nanostructured and tend to be hard, but have pure mechanical properties as a result of their porosities. An attempt was made to carbonize an organic precursor to produce a bulk material with much less …
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An electrochemical study on the ionic conductivity of ceramic electrolyte La1-2SrxCo3-yMyO3-sigma oxide and its Pd/Ag compsites
… were synthesized via combustion of their metallo-organic precursors and then annealing of the resulting amorphous oxides at different temperature to attain desire perovskite structure. The study showed that crystal structure, temperature of measurement, composition of the oxides and oxygen content …
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Toward the rational design of multifunctional nanomaterials: synthesis and characterization of functionalized metal-organic frameworks
Metal-organic frameworks (or coordination polymers) are a recently-identified class of porous polymeric materials, consisting of metal ions or clusters linked together by organic bridging ligands. The major advantage of MOFs over other traditional materials, such as zeolites or activated carbons, …
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Management of disinfection byproduct production in small drinking water systems
… and HAA formation by measuring the removal of organic precursors through each major treatment process and by studying the concentrations formed as part of normal treatment and distribution. Major results of this study include the observation that significant organic DBP precursor removal …
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Algal and bacterial interactions in producing precursors of trihalomethanes and other halogenated organics
… an effect on the trihalomethane (THM) or total organic halogen (TOX) formation potentials of algal extracellular products (ECP), and (2) whether or not diurnal cycling of THM and TOX precursors occurs in vitro. These objectives were addressed through culture studies of heterotrophic …
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Vapor Transport Deposition for Perovskite Solar Cells
… evaporation, VTD has the potential to deposit organic and inorganic perovskite precursor materials either sequentially or via co-deposition. Co-deposition can benefit film formation by increasing the deposition speed and improving film conversion. However, current co-deposition techniques can …
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Freeze-Casting For Facile Synthesis Of Novel Porous Materials
… porous carbons (HPCs) prepared from various organic precursors. Hierarchical structure is generated through the use of an ice template, colloidal SiO2, and physical activation of the carbon. The impact of carbon precursor (glucose, sucrose, resorcinol, and resorcinol formaldehyde), SiO2 …
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Trihalomethane compounds in the drinking water of Kuwait: A survey from source to consumer
… vs. shock), sea water temperature, level of organic precursors and contact time. Of much more important consequence, as far as the presence of these compounds in drinking water is concerned, was the degree of THM compounds formation as a result of the chlorination of drinking water before it …
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Oxidation of atmospheric organic carbon : interconnecting volatile organic compounds, intermediate-volatility organic compounds, and organic aerosol
.Organic molecules have many important roles in the atmosphere, acting as climate and biogeochemical forcers, and in some cases as toxic pollutants. The lifecycle of atmospheric organic carbon is extremely complex, with reaction in multiple phases (gas, particle, aqueous) and at multiple …
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Organic particle formation in halogen-influenced environments
… Secondary aerosol formation from the reaction of organic trace gases and reactive halogen species can act as an important natural source of organic aerosol. In order to better understand these reactions, aerosol formation from the reaction of α-pinene with chlorine and bromine was studied in …
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Laser produced SiO2/TiO2 coating on stainless steel substrate with sol-gel processes.
… interest because it starts with one or more organic precursors in a liquid state to build a solid inorganic structure on substrate. So it allows the preparation of homogeneous and pure film structures with the control of molecular range and the process is less complicated compared with other …
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Novel Methods to Characterise Atmospherically Relevant Organic Radicals and Reactive Oxygen Species
… is known to produce a plethora of oxidised organic compounds, which contribute to ozone formation and secondary organic aerosol production, two of the main characteristics of a polluted atmosphere. Furthermore, epidemiological studies have shown a close correlation between exposure to …
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Fabricating and Tailoring Halide Perovskites for Photovoltaic Applications
… deposition in which we use VTD to deposit the inorganic 4 precursor, not readily dissolved in industry acceptable solvents, and then react it with a solution of the organic precursors dissolved in a benign solvent. This technique allowed us to fabricate functioning FAPbI3 based solar cell …
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Ambient measurements of chemical and physical properties of organic aerosols: Insights into formation, growth, and heterogeneous chemistry
<p>Organic aerosols are a ubiquitous component of the troposphere, from heavily polluted cities to the remote Arctic. In Chapters II, III, and V of this dissertation, the formation of organic aerosol through observations of ambient size distributions is addressed. Chapter IV presents a new pathway …
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Heteroatom-Doped Graphitic Materials for Energy Storage
… materials were produced through pyrolysis of organic material. In Chapter 2, investigations into nitrogen-doping are made. Alterations to the synthetic procedure in combination with thorough structural and compositional analysis helps in understanding what factors make nitrogen-doped graphite …
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