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Showing 1 to 20 of 20 for “"Metal nitride"”.
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Nonaqueous syntheses of metal oxide and metal nitride nanoparticles
… work, we have shown new strategies to synthesise metal oxide and metal nitride nanomaterials. The first part of the work deals with the study of nonaqueous synthesis of metal oxide nanoparticles. We succeeded in the synthesis of In2O3 nanopartcles where we could clearly influence the morphology by …
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Ultraconformal chemical vapor deposition and synthesis of transition metal nitride films
… to conformally deposit stoichiometric and pure metallic films of hafnium diboride and iron in high AR features. By achieving high precursor pressure, growth rate saturation is maintained deeply into structures. CVD has a growth rate advantage over atomic layer deposition in high AR features. …
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Microstructure and properties of transition metal nitride and medium entropy alloy coatings
Hard thin film coatings play an important role in many industrial applications, such as cutting tools and biomedical devices. Magnetron sputtering, as one important deposition method, has been widely applied to a wide range of coating types. In this thesis, the microstructure and mechanical …
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Control of Microstructure and Texture in Nanocrystalline Transition -Metal Nitride Coatings by Ion Beam Assisted Deposition Method
In this study, titanium nitride (TiN), chromium nitride (CrN) and vanadium nitride (VN) were prepared by ion-beam-assisted deposition method (IBAD). The film microstructure was observed using scanning electron microscopy (SEM). The results showed that the microstructure was controlled by homologous …
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Texture evolution in metal nitride (aluminum nitride, titanium nitride, hafnium nitride) thin films prepared by off-normal incidence reactive magnetron sputtering
… of crystallographic texture in aluminum nitride (AlN), titanium nitride (TiN) and hafnium nitride (HfN) films deposited by off-normal incidence reactive magnetron sputtering at room temperature in N2/Ar mixtures. Texture measurements were performed by x-ray pole figure analysis of the …
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"Reactive hard templating" : from carbon nitrides to metal nitrides
… scale by classical templating approaches. Metal nitrides are such kind of materials. They are usually produced by the conversion of metals or metal oxides in ammonia flow at high temperature (T > 1000°C), which make the application of classical templating techniques difficult. Graphitic …
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Surface Morphology Evolution of Epitaxial TiN(001) Layers Grown by Reactive Magnetron Sputtering
The group IV-B transition metal nitride TiN is widely employed as a wear-resistant coating on mechanical components and as a diffusion barrier in microelectronic devices. I use the epitaxial growth of single crystal TiN as a model system for insight on the evolution of surface morphology and …
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Growth and characterisation of multifunctional nanocomposite coatings
… been exploited, to develop dense biphase helical metal-nitride interpenetrating nanocomposite coating microstructures with an exceptional nanohardness of up to 17.1 GPa, despite having a high iron content of 59 %. Finally, nanoporous nanocomposite coating forms have also been fabricated using a …
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Salts as highly diverse porogens : functional ionic liquid-derived carbons and carbon-based composites for energy-related applications
… templating”) 2)The one-pot synthesis of porous metal nitride containing functional carbon composites 3)The combination of both approaches, enabling the generation of highly porous composites with finely tunable properties All approaches have in common that they are based on the utilization of …
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The chemistry of metal-containing molecules in the circumstellar envelopes of late-type stars: Millimeter-wave observations and abundance modeling
… conducted in order to investigate the role of metal-containing compounds in the circumstellar envelopes surrounding these objects. The role of metal bearing molecules in the chemical evolution of these envelopes was also examined. These studies have led to the detection of a new interstellar …
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Catalysis over molybdenum containing nitride materials
… the reactivity of bulk and supported transition metal nitride catalysts, with particular emphasis on the possible reactivity of lattice nitrogen within bulk nitride catalysts. The experimental work has focussed on two main objectives: determining the most active transition metal nitride catalyst …
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Investigation and development of titanium nitride solid-state potentiometric pH sensor
… of limitations of glass electrodes, various metal oxides have been investigated and proposed as potential electrode materials for the development of pH sensors. Solid metal sensors offer unique features such as insolubility, stability, mechanical strength, and possibility of miniaturization. …
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Synthesis and Functionalizations of Trimetallic Nitride Template Endohedral Metallofullerenes (TNT-EMFs)
This thesis addresses the synthesis of a new mix-metal trimetallic nitride template endohedral metallofullerene (TNT-EMF) and the functionalizations of M3N@C80 (M = Sc, Gd, Ho) under the high-speed vibration milling (HSVM) condition. In addition, this thesis discusses the internal motion of the …
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Exohedral Functionalization and Applications of the Trimetallic Nitride Endohedral Metallofullerenes
… applications of the Sc₃N@C₈₀ and Sc₃N@C₇₈ trimetallic nitride endohedral metallofullerenes. In addition, this dissertation discusses miscellaneous research that is relevant to the aformentioned metallofullerenes and their applications, such as the discovery of a new cage isomer …
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Reactive Sputtering Deposition and Characterization of Zinc Nitride and Oxy-Nitride Films for Electronic and Photovoltaic Applications
… presents a study on the fabrication of zinc nitride and zinc oxy-nitride films, and related hetero-structures on glass, silicon and other substrates. The goals of this study include gaining fundamental understanding on the electrical and optical properties, the chemical-bonding states and the …
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Effect of low energy ion irradiation during growth on the composition, nanostructure, and physical properties of epitaxial metastable zirconium aluminum nitride
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-10-15T19:00:24Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Master Dissertation.pdf: 23101363 bytes, checksum: c35d98278c93a599d3b071276046859a (MD5)
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Low-temperature protonation studies of transition metal alkyl complexes and the synthesis and characterization of early transition metal PCP pincer complexes and two-coordinate alkylamido complexes
… pincer ligand and M is a group 10 transition metal. Complexes where R is isopropyl were prepared with nickel, palladium, and platinum. Additionally, complexes where R is t-butyl or adamantyl were prepared for nickel. Protonation of these complexes with HOTf in CDCl2F did not afford observable …
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Co-reactant interactions with CVD surfaces: Activation or passivation of growth
… a new route to achieve atomic layer etching of metals. The conformal deposition of highly conductive or superconductive transition metal nitride thin films is technologically important for a wide range of applications. For early transition metal nitrides, reaction of dialkylamido precursors and …
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Syntheses, properties, and reactions of transition metal complexes of di(tert-butyl)amide and 2,2,6,6-tetramethylpiperidide
Nitrides of the transition metals of groups 7-11 possess desirable properties, such as higher hardness and saturation magnetization than the corresponding metals. These nitrides have realized and potential applications in tool coatings and magnetic recording media. In order to develop new chemical …
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Synthesis, characterization and chemical vapor deposition of transition metal di(tert-butyl)amido compounds
Although the transition metal chemistry of many dialkylamido ligands has been well studied, the chemistry of the bulky di(tert-butyl)amido ligand has been largely overlooked. The di(tert-butyl)amido ligand is well suited for synthesizing transition metal compounds with low coordination numbers; …