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 9 of 9 for “"Polar Surfaces"”.
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Establishing Faithful Simulation of Polar Surfaces in Contact with the Aqueous Phase
Crystal surfaces which generate polar repeat units are fundamentally unstable on electrostatic grounds. As such, they require a charge-compensation mechanism if they are to exist at all. In vacuo, this usually presents as a self-ionisation (electronic reconstruction), or a non-stoichiometric …
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First principles energy density and its applications to selected polar surfaces and interfaces
Density Functional Theory has been successfully applied in solid state calculations where it has been customary to extract just a single number, namely the total energy. Within this formalism, we show that we can, in addition, compute an energy density which is useful despite its inherent …
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{112} Polar Surfaces of Copper(indium,gallium)selenide: Properties and Effects on Crystal Growth
… finding is the strong tendency of film surfaces to facet to {112} planes. The work attempted to establish the connections between the film morphology, the surface energies, the surface chemical compositions, and the reconstruction of polar surfaces. Using angle-resolved photoelectron …
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THE ROLE OF NATIVE POINT DEFECTS AND SURFACE CHEMICAL REACTIONS IN THE FORMATION OF SCHOTTKY BARRIERS AND HIGH N-TYPE DOPING IN ZINC OXIDE
… work explores the electronic properties of ZnO surfaces and interfaces and the impact of native point defects on Schottky barrier formation and doping.</p><p>The results presented here use a complement of depth-resolved cathodoluminescence spectroscopy (DRCLS), atomic force microscopy (AFM), …
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Steady State and Time-Resolved Cathodoluminescence Analysis of III-Nitride Semiconductors
… Importantly, the nanorods have exposed non-polar, semi-polar and polar surfaces. By using time-resolved cathodoluminescence, the difference in charge carrier dynamics at these exposed crystallographic facets will be investigated. This is carried out to assess the effect of polarity on the …
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Non-Covalent Interactions in Water Using Synthetic and Biological Receptors
… in water involves contributions due to polar functional group interactions, partial desolvation of polar and non-polar surfaces and changes in conformational flexibility. Here, conformationally well-defined supramolecular complexes formed between four different calix[4]pyrrole receptors …
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Hybrid Carbon Fiber/ZnO Nanowires Polymeric Composite for Stuctural and Energy Harvesting Applications
… of the composite, it was found that the polar surfaces in the ZnO structures facilitates good adhesion properties in the graphite-epoxy composite. Besides the attractive mechanical properties of the ZnO nanowires, their piezoelectric and semiconductor properties were sought to design an …
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Molecular adsorption at solid/liquid interfaces using self-assembled monolayer films
… the ability to produce well-defined organic surfaces of controlled composition. This thesis addresses the development and characterization of such films for controlling the adsorptive properties of surfaces toward various surfactant-like molecules and for proteins. Adsorption is controlled to …
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Growth and characterisation of group-III nitride-based nanowires for devices
… A reduction of the surface diffusivity on polar surfaces under N-rich conditions explains the anisotropic growth. Growth kinetics of the nanowires show that there are two important contributions to the growth. The first is growth by direct impingement and its contribution is independent of …