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 8 of 8 for “"scanning transmission X-ray microscopy"”.
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An Investigation of the Microstructure and Properties of a Cryogenically Mechanically Alloyed Polycarbonate-Poly(Ether Ether Ketone) System
… using a variety of techniques including microscopy and thermal analysis. Cryogenically mechanically alloyed powders processed for 10 hours were shown to have a sub-micron level two-phase microstructure. These powders were processed into testable coupons using a mini ram-injection molder; …
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The productive reuse of coal, biomass and co-fired fly ash
… Further characterization of these materials by scanning transmission X-ray microscopy analysis revealed the heterogeneity of the aluminosilicate phase composition of the co-fired fly ash geopolymer gel at the nano- to micro-scale.
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Physical and Chemical Properties of Matrix in Primitive Chondrites
… of discrete grains in their matrix. Micro X-ray diffraction was also used for mineralogical phase identification of the matrix constituents allowing the estimation of their modal mineralogy. MIL 0768 and Acfer 094 were also investigated using Scanning Transmission X-ray Microscopy (STXM) …
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Investigation of Size Specific Fe2O3 nanoparticles: Towards Single Nanoparticle Resolved Spectro-ptychography
Ptychography is a scanning coherent diffraction imaging technique, where an unlimited field of view can be probed with a high spatial resolution. This technique relies on the increased coherent flux from third-generation synchrotron sources to measure the absorption and phase of a sample. Since …
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Photochemical transformation of particulate organic carbon and its impact on mercury cycling in aqueous systems
… state were performed using synchrotron-based X-ray adsorption spectroscopy (XAS) and scanning transmission x-ray microscopy (STXM). These revealed a marked decrease in POM-reduced sulfur following irradiation, leading to fewer R-SH groups capable of strongly binding Hg. However, decreased Hg …
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Correlated NanoSIMS, TEM, and XANES Studies of Presolar Grains
… Secondary Ion Mass Spectrometry (NanoSIMS), Transmission Electron Microscopy (TEM), and Scanning Transmission X-ray Microscopy (STXM) utilizing X-ray Absorption Near Edge Structure (XANES), with a focus on connecting these correlated laboratory studies to astrophysical phenomena. The …
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Diffraction and Spectroscopy of Marine Calcite Biominerals: Insights into Structure and Geochemistry
… benthic foraminifera Amphistegina lessonii using scanning transmission X-ray microscopy (STXM). Na in the test of A. lessonii is incorporated in a spatially heterogeneous manner, showing banding in a mode comparable to that seen previously for B and Mg. The near edge X-ray absorption fine …
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Bridging Atomistic, Mesoscale, and Systems Perspectives in the Design of Vanadium-Based Energy Storage Technologies
… dissertation, synchrotron-based hyperspectral X-ray spectromicroscopy experiments, coupled with spectral standards, provide a direct examination of phase evolution upon Li-ion intercalation into V2O5. Here the role of nucleation limitations, strain, curvature, and defects on the spatial evolution …