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 10 of 10 for “"Microcrystal."”.
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Optical studies of ion-bombarded gallium arsenide
… on the interband electronic excitations in microcrystalline GaAs (μ-GaAs), which is known from previous work to exist in Be⁺-implanted disordered GaAs. The optical properties of μ-GaAs differ appreciably from those of the bulk crystal, the difference increasing with L⁻¹, the inverse of the …
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Optical characterization of processed gallium arsenide
… as an amorphous GaAs matrix embedded with GaAs microcrystals. The longitudinal-optic (LO) Raman-line characteristics were monitored to determine the amorphous volume fraction, the average microcrystal diameter and, for the annealed samples, the carrier concentration. An oscillator analysis of …
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On the phase transition and photo-reactivity on the micro-sized titanium dioxide single crystal.
… photocatalysts. This thesis, anatase TiO2 microcrystals are used to study the anatase-to-rutile phase transition (ART) process mechanism and compare the photo-reactivity to the bulk single crystals. Scanning Electron Microscopy (SEM), Raman Microscopy, and Photoluminescence (PL) Microscopy …
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The Rhame bed (Slope Formation, Paleocene), a silcrete and deep weathering profile, in southwestern North Dakota
… silt-sized detrital quartz grains in a matrix of microcrystal line quartz. It contains abundant casts and molds of branches, stems or roots of plants. It is underlain by sediment that is white to medium gray, consists of sand, silt, or clay, is very irregular in thickness, and lacks calcium …
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Bragg Coherent Diffraction Imaging of Metal Microcrystals Using a Multipurpose In Situ Cell Design
… (HE) of nickel (Ni) and copper (Cu) microcrystals. HE experiments confirmed the hydrogen evolution reaction (HER) at Cu surfaces and bulk embrittlement, using a removable silver/silver chloride (Ag/AgCl) electrode to maintain a stable reference potential. The cell’s chemical …
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Microneedle delivery for improved efficacy of antiretroviral and antibiotic drugs
… the microparticles. In addition, Ciprofloxacin microcrystals were synthesized. The microparticles and microcrystals were then loaded into molded polymer microneedles in a poly-acrylic acid (PAA) matrix. Standard curves were created for the two drugs from known concentrations and used to show the …
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Atomic structure characterization at the nanoscale using multi-modal electron diffraction
… by selected-area electron diffraction and microcrystal electron diffraction. We characterize the packing and morphology of semiconducting polymers in their solution-aggregated state, as well as the molecular structure of small molecules at different stages of an electrochemical reaction. …
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Petrography and Diagenesis of Cambrian Dolomite in Tabei Uplift, Northern Tarim Basin, China
… dolomites are interpreted as: Type 1 dolomite is microcrystal to very fine-crystalline replacement dolomite associated with mudstone, wackestone and packstone with well-preserved the precursor texture of limestone. Its δ18O value ranges from -5.7 to -10.0 (‰ vPDB) and δ13C value from 0.0 to -2.0 …
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Dynamics of Melt-mediated Crystallization of Amorphous Silicon Films
… which presumably do not contain preexisting microcrystal clusters (as for instance can be formed via high-dose ion-irradiation of Si wafers and PECVD deposition of a-Si films). Whereas the behavior of microcrystalline-cluster-containing a-Si films within the partial-melting regime was well …