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 6 of 6 for “"defects/vacancies"”.
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Quantitative Characterization of Nanovoids in Quenched Aluminum Using Small Angle X-ray Scattering Studies
… presented. Nanovoids are agglomerations of point defects (vacancies) in the metallic host. SAXS is a non-destructive, dynamic probe which is ideally suited to characterize nanoscale electron density inhomogeneities, e.g., electron density difference between void and metal matrix. Previous SAXS …
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Metal-insulator transition in yttrium- and neodymium-doped lanthanum nickelates
… the effect on superconductivity of oxygen defects (vacancies and interstitials, e.g., apical) and of strain (due to cation substitutions and substrate-film mismatch). The study also re-prompted the search for SC in the bulk material. The parent RNiO₃ bulk compounds are known to have a rich …
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Modeling the linkages between heat transfer and microdefect formation in crystal growth : examples of Czochralski growth of silicon and vertical Bridgman growth of bismuth germanate
… where the concentrations of two intrinsic point defects balance, in the crystal. Microdefect formation in CZ silicon is modeled with intrinsic point defects (vacancies and self-interstitials) and their agglomerates. The model is two-dimensional in space and predicts the radial profiles of point …
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Role of Vacancies and Electrochemical Applications of Facet-Controlled Synthetic Superlattice Nanomaterials
… solar cell (DSSCs) system. Further, since vacancies change the electronic structures of materials, and greatly influence their physical and chemical properties, it is important that the identification and quantification of vacancies’ types be characterized. In this context, types and …
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INVESTIGATION OF PHASE TRANSFORMATIONS IN TRANSITION METAL DICHALCOGENIDES DURING SYNTHESIS AND POST GROWTH
… with exposed basal planes features surface defects (vacancies, steps, ledges etc.) that act as sites for the onset of interfacial transformations, which occur readily with Ge and Li. Using the Ni-MoS2 system, further investigations were performed on the influence of elevated temperatures on …
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Role of point defects in Perovskite microwave resonators
… perovskite compounds containing extrinsic point defects such as vacancies. An empirical approach is used here to develop a predictive model based solely on chemical composition and published ionic radii. Effective vacancy sizes were derived both empirically from an existing model for pseudocubic …