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 16 of 16 for “"Interface effects"”.
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INTERFACE EFFECTS ON NANOELECTRONICS
… a quantitative determination of how surfaces and interfaces in organic nanoelectronic devices affect properties such as charge transport, electronic structure, and material fluctuations. Si/SiO<sub>2</sub> is a model gate/gate dielectric for organic thin film transistors, therefore proper …
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Photoemission Studies of *Interface Effects on Thin Film Properties
Extending the 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 …
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Photoemission studies of interface effects on thin film properties
… junction. A calculation based on the known interface chemistry and the electronegativity yields predicted barrier heights in good agreement with the experiment. These results demonstrate that the Schottky barrier height can be tuned to a desired value through an appropriate selection of …
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Surface and interface effects in valence band photoemission of noble metals
… have made it increasingly obvious that interfaces can dramatically change the electronic structure of noble metal thin films. This thesis addresses the effects of the surface and interfaces on electronic structure and on the photoemission process in the noble metals copper and silver. …
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Interface Effects and Deposition Process of Ionically Self-Assembled Monolayer Films: In Situ and Ex Situ Second Hamonic Generation Measurements
… of NLO-active layers near the glass and air interfaces is much stronger than the SHG response of layers in the bulk of the film for all deposition methods and NLO-active materials investigated in this thesis. For larger number of bilayers (the bulk regime), the square root of the SHG signal …
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DNA Hybridization and Ligation for Directed Colloidal Assembly
… crystals. Since the drying and liquid-air interface effects experienced during vertical deposition are not a factor for sedimented colloidal crystals, we attempted to use templated substrates, created by imprint and holographic lithography, to assemble non-FCC colloidal crystals.
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Acoustic classification of buried objects with mobile sonar platforms
… scattering mechanisms and due to the interface effects on the target scattering. New sonar strategies are also shown that exploit incoherent wide apertures that are created by multiple sonar platforms. For example, target shape can be inverted by mapping the scattered field from the …
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First-Principles Study of Band Alignment and Electronic Structure at Metal/Oxide Interfaces: An Investigation of Dielectric Breakdown
… the electronic structure at metal/oxide interfaces is studied using first-principle calculations within the framework of Density Functional Theory (DFT) to investigate any possible key signature that would trigger the dielectric breakdown. A classical band alignment method, the Van de …
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Characterization of Dopant Diffusion in Bulk and lower dimensional Silicon Structures
… over the channel such as reducing short channel effects, and minimizing second order effects are currently being investigated. Such novel device architectures such as Fully-Depleted (FD) planar Silicon On Insulator (SOI) MOSFETS, Triple gate SOI MOSFET and Gate-All-Around Nanowire (NW) MOSFET …
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Effect of interface structure on film polarization and surface chemistry in ultra-thin TiO2/BaTiO3 Heterostructures
… and manipulate these properties for desired effects at larger lengths scales. It has become increasingly realistic to optimize and tailor material properties for potential applications in electronics, nanotechnology and energy harvesting. For example, when disparate oxides are integrated …
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Theoretical investigations of the electronic processes in organic photovoltaics
… separation processes at the organic/organic interface, which can only be remedied by a combined theoretical and experimental effort. In this thesis we use a variety of computational techniques to address current questions in the field or organic photovoltaics. Applying the [delta]SCF method …
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Heteroepitaxial Interfaces Modify Collective States in Complex Oxides
… epitaxially. In this work aggregate response and interface effects of heteroepitaxial digital superlattices (DSLs) with thickness of each constituent approaching the ultimate molecular layer limit is discussed. The samples were assembled by Ozone assisted atomic layer by layer molecular beam …
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Surface and mechanical stress effects in AlGaN/GaN high electron mobility transistors
… off-state. Thereafter, two important surface and interface effects were studied in this thesis. In the first one, the impact of surface cleanings, surface treatments and plasma-based dry etch conditions on two different types of ohmic contact technologies was investigated. Contact resistance …
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Self-organization on Nanoparticle Surfaces for Plasmonic and Nonlinear Optical Applications
… the plasmonic enhancement primarily stems from interface SHG. Interface effects were characterized by direct comparison of SHG signals from PAH/PCBS ISAM films and PAH/PB HCISAM films. Though interface &chi²⁺ is substantially smaller in PAH/PCBS than in PAH/PB, plasmonically enhanced PAH/PCBS …
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Transient optical and electrical effects in polymeric semiconductors
… as very efficient electron conductors and that interface effects such as charge trapping play the key role in determining the overall device efficiency. This work contributes to the knowledge of how charges drift through the polymer layer to finally find neutral emissive trap states and thus …
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Reduction of Dose Calculation Errors For Patients With Metal Implants Receiving Photon Radiation Therapy
… calculation algorithms in modeling metal/tissue interface effects. Metals also cause streak artifacts in the computed tomography (CT) images that are used for treatment planning, and these artifacts can also degrade dose calculation accuracy. Metal based-energy deposition kernels are a potential …