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Showing 1 to 20 of 81 for “"FILM PROPERTIES"”.
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Photoemission Studies of *Interface Effects on Thin Film Properties
… exploration of interfactant effects to physical properties, the thermal stability temperatures of Pb films are measured with photoemission. The quantized electronic structure in Pb films causes the thermal stability to oscillate with an approximate bilayer period. A comparison among the systems …
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Photoemission studies of interface effects on thin film properties
As the thickness of a metallic film decreases to the atomic scale, the confinement of the film's electrons by its boundaries gives rise to discrete electronic states, known as quantum well states, which dominate the film properties. This work investigates the use of film-substrate boundary …
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Effect of network structure on lignin-derived polyurethane film properties
Thermosetting polyurethane films were prepared from solution by crosslinking hydroxypropyl lignin derivatives with diisocyanates. The network structure, characterized by the crosslink density, was controlled by two variables: the hydroxy content of the lignin polyol and the molar ratio of NCO:OH. …
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Growth and characterization of Ru films deposited by chemical vapor deposition : towards enhanced nucleation and film properties
… need to deposit ultra-thin, smooth, continuous films for use in applications such as the liner in back end processing. The liner must have good adhesion to both Cu and the dielectric, act as a Cu diffusion barrier, and be conductive enough to allow the electroplating of Cu. Ruthenium (Ru) has …
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Role of Aqueous Phase Chemistry, Interfacial Film Properties, and Surface Coverage in Stabilizing Water-In-Bitumen Emulsions
… salt type, salt concentration, pH, interfacial film properties, surface coverage, drop size, and emulsion packing. Model water-in-oil emulsions were prepared from aqueous phases consisting of reverse osmosis water and salts (NaCl, CaCl2, Na2SO4, KCl and Na2CO3). The organic phases consisted of …
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DC magnetron reactive sputtering of low stress AlN piezoelectric thin films for MEMS application
… (MEMS) often incorporate piezoelectric thin films to actuate and detect motion of mechanical structures. Aluminum nitride is advantageous for MEMS use because it can be deposited at low temperatures, is easily patterned using conventional photolithographic techniques, and is compatible with …
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UV-curable organic-inorganic hybrid polyurethane coating
… group concentration and time. The general film properties were also studied. The results showed that the free-radical reaction and the sol-gel reaction took simultaneously upon exposure to UV radiation. The extent of the sol-gel reaction was decreased at the presence of acrylate groups. The …
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Fabrication and Characterization of Tunable Conducting Polymer Micro- and Nano-Structures for Bioelectronics
… conditions of electrochemical deposition and the properties of the resulting CP films or microstructures. The first project elucidated the quantitative relationships between electrochemical deposition parameters and the surface nanostructure of poly(3,4-ethylenedioxythiophene) (PEDOT) and …
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Microstructure and phase development in yttrium barium(2) copper(3) oxygen(7) superconducting films prepared from carboxylate precursors
Superconducting $\rm YBa\sb2Cu\sb3O\sb{7-x}$ thin films, 0.1-1.5 $\mu$m thick, were prepared from carboxylate precursors by reactive liquid phase sintering. Processing effects on phase development, microstructure evolution, and important film properties, such as transition temperature, critical …
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Effect of nano- fillers on tensile properties of biopolymer films
… structural materials. However, their mechanical properties are limiting. Current research is focused on modifying the physical and chemical properties of biopolymers for better performance and broader applications. The addition of nanofillers has been proposed as a way to modify mechanical …
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Granular Alloy Film Synthesis Using Ionized Cluster Beam Deposition
This thesis involves film growth and characterization, aerosol and gas flow dynamics, ion beam optics, and the production of nanoclusters and their magnetic behavior. Films are grown by simultaneous deposition of ionized nanoclusters from a beam and of atoms from an evaporation source. The …
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Amorphous hydrogenated boron carbide for solid-state direct-conversion thermal neutron detection
… poor and/or not well understood charge transport properties as well as fabrication challenges. This study focuses on obtaining thick and stable a-BC:H films using plasma-enhanced chemical vapor deposition (PECVD) and optimizing their charge transport properties for potential application in …
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Investigation of signal shape effects on the gas film in spark-assisted chemical engraving
… intricate control requirements linked to the gas film surrounding the tool present a significant challenge in SACE. While several studies have explored the influence of SACE parameters on the gas film, there exists a literature gap regarding the impact of voltage signal shapes on this film. The …
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FUNCTIONAL THIN FILMS BY SPATIAL ATOMIC LAYER DEPOSITION FOR PHOTOVOLTAIC APPLICATIONS
… focuses on the development and analysis of thin films deposited by spatial atomic layer deposition for application in the photovoltaic industry. The atomic layer deposition technique offers good uniformity, conformality and precise film thickness control. The spatial atomic layer deposition …
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Nonequilibrium excitations in superconducting aluminum and high-temperature superconducting devices
… ceramic oxide superconductors. We have made thin films of both $\rm YBa\sb2 Cu\sb3 O\sb{7-x}$ and BiSrCaCuO by several methods, and measurements of bulk film properties are presented. These films have been patterned into different structures in a number of ways, including an in-situ ion milling …
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Synthesis of environmentally-friendly polyurethane dispersions based on soybean oil- derived polyols and their applications in advanced water-based and uv-cure coatings
… and oil resistance. In order to develop these properties, two different polyol families were synthesized. The first polyol can be used in ambient curable systems, and the second can be utilized in ultraviolet radiation cure coatings. For ambient curable systems polyether chemistry based …
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Influence on molecular geometry and chain conformation on properties of polyelectrolyte multilayers
… versatile technique for fabricating thin polymer films. This thesis compares the properties of LbLfilms composed of different weak polycations. Slight perturbations in film assembly conditions can lead to large differences in film properties. Polyion bacisity and architecture are less understood …
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Chemical vapor deposition of organosilicon composite thin films for porous low-k dielectrics
… vapor deposition has produced organosilicon thin films with the potential use as low dielectric constant interconnect materials in microelectronic circuits. Both diethylsilane and octamethylcyclotetrasiloxane precursors were used, with oxygen and hydrogen peroxides oxidants respectively, to …
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Evaluation of fluid dynamic effect on thin film growth in a horizontal type meso-scale chemical vapor deposition reactor using computational fluid dynamics
… this thesis research is to understand how thin film uniformity can be controlled in a CVD reactor. A complete understanding of chemical reactions that take place both in gas phase and at the deposition surface is required to predict thin film properties such as growth rate and composition …
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Europium oxide as a perfect electron spin filter
… the spins during tunneling. High-quality EuO films at the monolayer level is necessary for efficient spin-filtering. Because non-ferromagnetic, insulating Eu20 forms more readily, growth of an ultra-thin, high-quality film is quite challenging, which restricted previous studies of EuO to bulk …
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