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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 129 for “"Atomic structure"”.
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Atomic Structure Study of Metallic Nanoparticles
Made available in DSpace on 2017-07-06T18:48:50Z (GMT). No. of bitstreams: 3 Ji_Li_MS.pdf: 6656305 bytes, checksum: 5b18c54244ccb562930faec4c69c39f2 (MD5) Ji_Li_MS_ABS.pdf: 10304 bytes, checksum: 10f22d26ec0cdaaed80918c03176e497 (MD5) license.txt: 4813 bytes, checksum: …
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Atomic structure characterization for YIG/ permalloy heterostructures
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Computational Atomic Structure and Search for New Physics
… on extensions tothe Standard Model (SM) through atomic-structure computations. More specifically,atomic parity-nonconserving (PNC) amplitudes and intrinsic electric dipole moments(EDM) are examined for sources of physics beyond the SM. Precision calculationsof these properties in the trivalent …
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Voxelized Atomic Structure Framework for Atomistic Modeling of Multifunctional Materials
… with physics-driven simulation methods alone. Atomic systems at the first-principles level are typically considered the smallest relevant length scale in materials modeling, and thus form the foundation of the multiscale physics governing the material response. This work introduces a new …
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Gold And Silver Alloy Nanoparticles: Synthesis, Characterization And Atomic Structure
… least in one dimension. The composition and the structure/geometry of the nanoparticles determine the chemical properties and reactivity. Modern research focus on method development in atomically monodisperse nanoparticle synthesis. This dissertation describes the method development for synthesis …
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Thermodynamic properties and atomic structure of Ca-based liquid alloys
To identify the most promising positive electrodes for Ca-based liquid metal batteries, the thermodynamic properties of diverse Ca-based liquid alloys were investigated. The thermodynamic properties of Ca-Sb alloys were determined by emf measurements. It was found that Sb as positive electrode …
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Bulky Thiolated Gold Nanomolecules: Synthesis, Characterization, Optical Properties, and Atomic Structure
… by the type of capping ligand. The overall structure, size, surface percentage of ligands, and structure of an entire gold NM is changed based on the type of ligand used to synthesize it. Ligand type, such as aliphatic, aromatic or bulky play a crucial role in determining the size and …
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Atomic structure characterization at the nanoscale using multi-modal electron diffraction
… direct observation of shape, size, and internal structure of nanomaterials using electron microscopy. While synthesis and structural characterization have traditionally progressed in tandem, the growing structural and chemical complexity of these materials now pushes the limits of current …
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Initial oxidation of zirconium : chemistry, atomic structure, transport and growth kinetics
… thesis is to uncover the chemical states and atomic structure of the initial oxide on zirconium and the oxygen transport kinetics through this oxide under electric field. This goal is important for enabling more accurate zirconium oxidation models, for example for nuclear reactor materials, as …
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Studying magnetic and 3D atomic structure using 4D scanning transmission electron microscopy
… 4D-STEM experiments for studying magnetic and 3D atomic structure, complemented with simulations to validate those results. First, we explore 4D-STEM techniques for imaging the magnetic structure of antiferromagnets. Antiferromagnets can potentially be used to create faster, more robust memory …
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Effect of Dopants on the Local Atomic Structure and Sintering Behavior of Bismuth Sodium Titanate
… Like PZT, it crystallizes in the perovskite structure. Since the dielectric and piezoelectric properties of pure BNT ceramics are insufficient for application, BNT is often modified by the addition of dopants. These influence a great variety of material properties to different degrees, e.g. …
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Atomic structure and defects of III-V compound semiconductor strained-layer-superlattices for infrared detection
… promises of high device performance of these structures have yet to be realized, primarily due to the Shockley-Read-Hall recombination process which shortens the minority carrier lifetime. The microscopic origin responsible for the short carrier lifetime is still unknown, which is a major …
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Understanding the origin of the recovery of superconductivity in halogenated YBCO single crystal : atomic structure study
… performed multiple-edge x-ray absorption fine structure (XAFS) measurements about the Y K, Ba L_3, I L_3, Cu K and Br K-edges at room temperature on brominated (non-brominated) and iodinated (non-iodinated) YBCO single crystals. Our XAFS results at the Br K (brominated) and I L_3 -edges …
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Ligand Effect on Gold Nanomolecules Demonstrated Using Aliphatic, Aromatic and Bulky Thiolate Ligands
Atomically precise thiolate protected gold nanoparticles (AuNPs) known as gold nanomolecules (AuNMs) are intensely pursued owing to their feasibility to elucidate their structure by single crystal X-ray crystallography. They have distinct number of Au atoms (n) and thiolate (-SR, R-hydrocarbon …
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Coherent X -Ray Diffractive Imaging and Nucleation of Protein Crystals
The determination of the atomic structure of proteins is very important since much understanding of biological processes cannot be achieved without knowledge of the atomic structure. The preparation of high quality protein crystals suitable for structure determination often proves difficult and …
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Dirac R-matrix scattering calculations in support of plasma diagnostics
The atomic structure of singly ionised nickel (Ni II), singly ionised tungsten (W II) and doubly ionised germanium (Ge III) are thoroughly analysed and subsequently incorporated into scattering calculations. W II is needed to ensure reliable erosion diagnostics when investigating the influx of …
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Solar energy conversion via photovoltaics and photocatalysis
… catalytic material, controlling the catalyst's atomic structure is of primary importance since their functionalities (e.g., electronic band structure, catalytic activity, chemical stability, etc.) are governed by its atomic structure. According to the strategy, BiVO 4's atomic structure has been …
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Study of the effectiveness of animations used in high school chemistry classes
… concepts and focuses on the nature of matter, atomic structure, and classes of chemical reactions. This project observes the effectiveness of animation usage in a secondary science classroom setting, which was measured through student opinions and impressions as well as performance. It was …
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R-matrix calculations in support of diagnostics for fusion and astrophysical plasmas
… iron (Fe II), and neutral iron (Fe I). While atomic data for the neutral stages of molybdenum and tungsten finds an important application when investigating the influx of impurities into magnetically confined fusion plasmas, atomic data for the low ion stages of iron facilitates the study of …
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