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 170 for “"Surface Structure"”.
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Semantic conditions of surface structure.
Massachusetts Institute of Technology. Dept. of Foreign Literatures and Linguistics. Thesis. 1974. Ph.D.
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Deep and surface structure constraints in syntax.
Massachusetts Institute of Technology. Dept. of Modern Languages and Linguistics. Thesis. 1968. Ph.D.
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Surface Structure and Its Effect on Reducing Drag
… the tunnel could be used to study the effects of surface finish on the drag of various models. Several fabrics with differing ribbed surface structures, including a Fastskin FSI swimsuit fabric, were adhered to NACA 0012 wing models to access their effectiveness in reducing drag at zero incidence. …
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Surface Structure and Growth Mechanisms of ɑ-Si:H
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-17T19:16:12Z No. of bitstreams: 1 1999_kilian.pdf: 4054263 bytes, checksum: ed573e79ccecfb198fdd0714771495d3 (MD5)
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Surface Structure/Property Relationship for (001) Surface of Magnetite
… In this work, natural single crystal Fe3O4 (001) surfaces are studied with a variety of techniques. It is discovered that the Fe3O4 (001) surface structure and properties are dependent on the surface preparation methods. Conventional processed surfaces in an oxygen-rich environment are found to be …
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Surface Structure and Growth Mechanisms of Hydrogenated Amorphous Silicon
Made available in DSpace on 2015-09-25T20:03:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9921704.pdf: 3532216 bytes, checksum: d6159bd04f372d8389e2b6d995b4b7fe (MD5) Previous issue date: 1999
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Techniques of Geophysical Prospection as applied to Near Surface Structure Determination
… application in the detection of discrete, near-surface features. The research includes the design and development of instruments to facilitate these measurements, in both laboratory and field environments. Field surveys over a variety of small scale features, are carried out to define the …
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Surface structure enhanced microchannel flow boiling of low surface tension fluids
… been successfully mitigated by the addition of surface microstructures. Thermohydraulic performance in terms of critical heat flux (CHF) and heat transfer coefficient (HTC) have also benefited from surface modification, without significantly adding to the overall flow pressure drop. For some …
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Yeast flocculation: understanding cell surface structure-function relationships in industrial yeast strains
… or indirectly on characteristics of cellular surfaces, usually the outer layer of the cell wall. Change in the structure and or composition of the cell wall leads to changes in the microbial adhesion properties. Exploring more into the cell wall and studying the nanoscale structure of the …
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Protein deposition at polymer surfaces:the bulk and surface structure-property effects of hydrogels
… protein adsorption in relation to the bulk and surface structure-property effect s of hydrogel polymers. In order to achieve this it was first necessary to characterise the bulk and surface properties of the hydrogels, with regard to the structural chemistry of their component monomers. The bulk …
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Control of surface structure and properties of responsive hydrogel interfaces via electrostatic interactions
… highly dependent on their chemical and physical structure. The optimal performance of hydrogels in these applications often relies on their interfacial properties. Hence, it is crucial to understand how to actively design and control this.[2] Among others, charge incorporation in hydrogels has …
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Surface structure and composition determination by low-energy electron scattering and Monte Carlo simulations
<p>This thesis reports on surface and surface alloy structural and compositional determination with low-energy electron scattering and Monte Carlo simulations. Low-energy electron diffraction (LEED) technique and the newly developed low-energy electron microscopy (LEEM) IV technique are used to …
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Effect of size and surface structure manipulation on the luminescent properties of silicon nanoclusters
Structures measuring several nanometers in any dimension represent a transitional scale between materials with crystalline order and molecules. Quantum confinement of the carrier wavefunction within such structures may significantly alter their electronic behavior. Additionally, the effect of …
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Long Chain Molecules in the Molten State: Surface Adsorption, Near Surface Structure, and Mutual-Diffusion
<p>The surface segregation in a binary mixture of polymer due to surface energy difference or end-grafting is studied. The surface energy difference induced segregation is compared with the mean-field theory. The end-labeling of chains strengthens the ability of the chain to bind to the surface, …
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The Effect of Surface Structure on the Decomposition of Nitric-Oxide and Ammonia on Platinum
… on Pt(100), Pt(411), and Pt(211). The three surfaces were predicted to have similar orbital availabilities but different site densities. The measured dissociation fractions were 66, 70, and 66% on Pt(100), Pt(411) and Pt(211) respectively. The NO binding energy on the (100) steps of Pt (211) …
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Stress evolution during growth and atomic-scale surface structure effects in transition-metal thin films
… to the thickness, resulting in very high surface-to-volume ratios. For this reason, the surface characteristics of a film play an important role in the properties of the film as a whole. This research focused on the connections between the properties and the surface state of metallic thin …
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Improving selectivity in electrochemical CO₂-to-fuels catalysis : the role of catalyst mesostructure, surface structure, and electrolyte
… of catalyst activity: the electrochemical surface area. Using double layer capacitance measurements in aprotic electrolytes and atomic force microscopy to independently determine surface areas, it is possible to obtain a general value of specific capacitance (~11 [mu]F/real cm²) across …
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First principles study of effect of surface structure on chemical activity of Pt electrocatalysts in fuel cells
… the solution is elucidating relationship between surface structure and chemical reactivity as electrocatalysis occurs on its surface. However, in spite of concerted experimental and theoretical research over the last decades, the detailed mechanism is still in debate. This thesis explores a …
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Investigations of Bacteria Viability on Surfaces Using ω-functionalized Alkanethiol Self-Assembled Monolayers
The structure/function relationship between bacteria and biocidal molecules in the vapor or solution phase is well-understood. However, the fundamental structure/function relationship between covalently-bound biocidal surface molecules and bacteria is not. While a number of antibacterial surfaces …
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Towards first-principles prediction of electrocatalytic activity of ABO₃ perovskites
… catalysts, a deeper understanding of composition-structure-activity relationships is required. Currently, this endeavor is hindered by the complexity of the oxide surface structure and challenges in atomic-scale experimental characterization under in operando conditions. In this thesis, we address …
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