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 81 for “"Structural defects"”.
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Chemisorption on Perfect Surfaces and Structural Defects
Made available in DSpace on 2014-12-14T16:00:34Z (GMT). No. of bitstreams: 1 7804073.pdf: 11727424 bytes, checksum: 8b66830e712c7af5f8265f1b75d4d38c (MD5) Previous issue date: 1977
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Interplay between mineral reaction and deformation via structural defects
… dolomite rim growth. Two microstructural domains could be identified characterized by palisade-shaped dolomite grains growing into the magnesite and granular dolomite growing towards calcite. A model was provided for the dolomite rim growth based on the counter-diffusion of CaO …
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Performance limits of silicon solar cells due to structural defects
… these wafers is limited by the presence of structural defects, like grain boundaries and dislocations, that are absent from more expensive alternatives. This thesis presents a methodology to quantify the technology innovations necessary to reach climate-driven deployment targets for …
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Robotic Inspection and Data Analytics to Localize and Visualize the Structural Defects of Civil Infrastructure
… to visualize, label, and measure surface defects from collected RGB and Depth images.</p> <p>This thesis reviews various solutions proposed by researchers to address the challenges in robotic-based inspection and data analytics, demonstrates the proposed solutions and contributions, …
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Advances in the CVD growth of graphene for electronics applications
… process that was found to be sensitive to structural defects in the graphene film. A strong correlation between the density of structural defects and the electron mobility emphasizes their importance for high quality graphene devices. The dimensions of graphene defects were found to be …
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Structural defect engineering of tin (II) sulfide thin films for photovoltaics
… lifetime. In this work, I assess the impact of structural defects and anisotropy on the minority-carrier lifetime and other key device parameters, shedding light on the path to high-efficiency SnS-based photovoltaics. SnS thin films are deposited by thermal evaporation in a range of growth …
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Pulsed laser deposition of superconducting Sr2RuO4 thin-films and the role of crystallographic defects
… challenging to achieve in thin-films as structural defects and impurities sensitively annihilate the superconducting state. Despite a handful of successful results on the growth of superconducting SRO214 thin-films by molecular beam epitaxy (MBE), reproducible growth by pulsed laser …
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IIl-nitride nanowires and heterostructures : growth and optical properties on nanoscale
… due to strain relaxation, reduced density of structural defects, and easier light extraction. Material quality and effective band engineering of such III-nitride nanowires are crucial for the design and fabrication of their optoelectronic applications such as LEDs, lasers and photodetectors. …
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The Effect of Surface Processing Methods on the Laser Induced Damage Threshold of Fused Silica
… to the mechanisms of LID, the effects of surface structural defects and contaminants on the LID are analysed and some simulation work is done. 2. By means of the Magnetorheological Finishing (MRF) method, surface structural defects, i.e. surface and sub-surface damage, are removed because the MRF …
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Decentralizing energy generation: policy recommendations for Germany
… and ecologic performance. Thereby, five common structural defects of previous studies will be avoided. The result will look rather different from the recommendations currently articulated loudest. The second part will analyze the strategic interests of energy players concerning the previously …
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Synthesis and Optical Characterization of Boron based Nanostructured Materials
… of origin of photoluminescence and the impact of structural defects on photoluminescence. In summary, this thesis provides a detailed understanding of the defect–property relationship in boron-based nanomaterials, explains the luminescence origin in boron nanodots, boron oxide nanoparticles, and …
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Elucidating efficiency losses in cuprous oxide (Cu₂O) photovoltaics and identifying strategies for efficiency improvement
… a large negative conduction band offset and structural defects lead to a low built-in voltage and high recombination activity. The effects of interface engineering are demonstrated in experiment and simulation. Broader simulations suggest opportunities for future efficiency improvements …
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Uncovering a novel role for FXR-SHP axis in liver physiology, diseases and beyond
… in increased glycosylation of liver proteins and structural defects in Golgi apparatus, and ultimately liver cancer. Chapter 3 focuses on comprehending how FXR-SHP ablation results in increased drug metabolic capacity of the liver. Finally, chapter 4 discusses how liver dysfunction, caused by loss …
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Antimony-based type-II superlattice infrared photodetectors on indium-arsenide substrates
… electron beam induced current (EBIC) to study structural defects. Through this work, the optical absorption of the undoped substrate was shown to be significantly lower than that of GaSb. The detectors have a cutoff wavelength (50% re- sponsivity) of 9.5 um at 78 K. Their R0A values are on the …
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Structure-property relations of nanostructured carbon systems as a function of processing
… properties of engineering materials. However, structural defects can significantly alter the intrinsic properties of CNTs, thereby limiting the physical properties of aligned CNT nanocomposite architectures. Previous studies have shown the difficulty in getting quantitative data for CNT quality …
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Using Deep Learning to Understand and Design Heterogeneous Materials
… materials can also be achieved by integrating structural variations into their design. By altering topological configurations or embedding structural defects, there exists substantial potential for tailoring materials properties and behaviors. However, the compositional and structural …
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Production of a nanostructured copper by Spark Plasma Sintering
… as that of heating rate and holding time on the structural evolution has been investigated. Particle rearrangement, local deformation, bulk deformation and sintering are the SPS mechanisms occurring successively during the sintering process of the atomized copper. These mechanisms are enhanced by …
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An investigation of the relationships between inventory and inspection data of RC bridges and RC culverts in the Western Cape Province
… data contained in BMSs have mainly been used for structural prioritization. Hence, the purpose of this study was to utilize the Struman Bridge Management System database to investigate the relationships that exist between the inventory and inspection data of the Reinforced Concrete (RC) bridges …
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Atomistic simulation of strength and deformation of ceramic materials
… and computational algorithms to probe the microstructural effects in crystalline, amorphous, and nanocrystalline media. Specific issues of a materials property or mechanics of materials nature are addressed in the context of characterizing the limits to strength and mechanisms of structural …
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The Effect of CT Display Window and Image Plane on Diagnostic Certainty for Characteristics of Canine Elbow Dysplasia
… or absence of hypoattenuating MCP subchondral defects, in situ MCP fissures, discrete MCP fragments, irregularity of the radial incisure of the ulna, subchondral sclerosis of the trochlea humeri, osteochondrosis or kissing lesions, and joint incongruity. Level of diagnostic certainty for each …
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