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 27 for “"Surfaces and Interfaces"”.
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Conduction electrons at surfaces and interfaces
Contains fulltext : mmubn000001_143808370.pdf (Publisher’s version ) (Open Access)
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Electrical properties of silicon surfaces and interfaces
… process tolerances for high quality silicon surfaces. Second, Si-based light emitting devices are studied to address a longer-term move towards photons instead of electrons for data transfer. A concerted effort is made to engineer environmentally benign solutions to these challenges. Highly …
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Bottlebrush Polymers: A Pathway to Engineering Surfaces and Interfaces
… are macromolecules with a linear backbone and densely-grafted polymeric side-chains. Steric repulsion between the side chains forces the backbone to extend, leading to a rod or wormlike conformation. Therefore, bottlebrush polymers resemble both comb polymers and polymer-grafted particles. …
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Ab initio studies of semiconductors : defects, surfaces and interfaces
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Nanoscale Manipulation of Surfaces and Interfaces: Engineering Electrical Properties Through Nanofabrication
Nanotechnology interest and research has increased dramatically over the last decade, but there remain fundamental limitations and barriers to the fabrication of ever smaller devices. To overcome these limitations, new nanofabrication methods and novel nanoscale systems must be explored. To form …
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Surfaces and interfaces characterization for the development of diamond power electronic devices
… challenges of humanity with increasing energy demands. High power elements in the electric grid such as rectifiers are currently based on silicon. Design of new architectures has kept silicon-based devices on top of the high-power devices market. However, the inherent limitations of silicon have …
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Core-Level Photoemission Studies of the Structure of Semiconductor Surfaces and Interfaces
… emission angle. The SiO2 layer is amorphous, and photoelectron diffraction techniques cannot be employed. A new approach based on the abrupt-interface model is used to study the structure of the Si(111)/SiO 2 interface. In this model, all the sub-oxide states are confined at the interface …
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First principles energy density and its applications to selected polar surfaces and interfaces
… is useful despite its inherent non-uniqueness, and which comprises of a kinetic energy density, a Maxwell energy density which describes the long-range Coulomb interaction, a term that includes the exchange-correlation interaction, and other contributions that depend on the external potential.
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Role of sulfur in vibration spectra and bonding and electronic structure of GeSi surfaces and interfaces
… atomic configuration, vibration mode frequencies and electronic structure of surfaces and interfaces using germanium. Initially, we investigated the H2S and H2Opassivated germanium surfaces. A supercell approach is used with the local density (LDA), generalized gradient (GGA) approximations and …
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Random growth of interfaces: Statistical analysis of single columns and detection of critical events.
The dynamics of growth and formation of surfaces and interfaces is becoming very important for the understanding of the origin and the behavior of a wide range of natural and industrial dynamical processes. The first part of the paper is focused on the interesting field of the random growth of …
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A study of copper thick film conductor adhesion mechanisms on ceramic substrates
… study, copper thick film adhesion mechanisms and its failure modes on different ceramic substrates (glass ceramic, $\rm Al\sb2O\sb3$ and AlN) were investigated as a function of aging time at 150$\sp\circ$C in the presence of Pb/Sn solders. The copper thick film inks were formulated from copper …
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Theory of d₀ perovskites and their heterostructures
… of a two-dimensional electron (2DEG) gas at interfaces between nonpolar SrTiO₃ (STO) with other polar perovskites has lead to an enormous amount of research. Among this 2DEGs most interesting properties are two-dimensional superconductivity and ferromagnetism, sometimes concurrent. This study …
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Surface-mediated mechanisms for defect engineering in metal oxides
The types, concentrations and spatial distributions of solid point defects such as vacancies and interstitial atoms influence the performance of metal oxides in gas sensing, electronics, photonics and solar-induced photochemistry for fuel production and environmental cleanup. Controlling these …
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Microscopic and spectroscopic characterization of fuel cell catalyst layer materials and interfaces
… of the heavy-duty transportation sector and of industrial processes. This thesis is focused on detailed electron microscopy and x-ray spectroscopy characterization of composition and morphology of surfaces and interfaces in PEMFCs with the goal of building structure-property-processing …
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Vibrational Imaging at the Nanoscale: Surpassing the Diffraction Limit Using Tip-Enhanced Raman Spectroscopy
A deep understanding of the chemical composition of surfaces, interfaces or nanoscale structure with a high spatial resolution is an important goal in nanoscience and nanotechnology. Structural information can be collected using a variety of high spatial resolution techniques such as atomic force …
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Surface and interface studies of compound semiconductors
The geometric and electronic properties of compound semiconductor surfaces and interfaces were studied using experimental techniques such as electron and x-ray diffraction, Auger spectroscopy, synchrotron photoemission, and scanning tunneling microscopy. Some of the surface and interfacial …
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A nanoscale probe of the quasiparticle band structure for two dimensional electron systems
… materials has provided avenues to create and study designer electronic quantum phases. The coexistence of superconductivity, magnetism, density waves, and other ordered phases on the surfaces and interfaces of these 2D materials are governed by interactions which can be experimentally …
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INTERFACE EFFECTS ON NANOELECTRONICS
… thesis is 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 …
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Tuning Melt/Brush Interactions for Functional Polymer Films
… anti-fouling coatings, barrier coatings, and adhesives. In many applications, the functionality of these films is controlled by surface and interfacial properties. Polymer brushes can modify the chemistry, energetics and function at a polymer/substrate or polymer/air interface. This thesis …
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