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 “"STXM"”.
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Investigation of Size Specific Fe2O3 nanoparticles: Towards Single Nanoparticle Resolved Spectro-ptychography
… Scanning Transmission X-ray Microscopy (STXM) imaging with ptychographic imaging and then use ptychography images to obtain spectra. Both STXM and ptychography are spectro-microscopy techniques based on Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy, which provides …
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Correlated NanoSIMS, TEM, and XANES Studies of Presolar Grains
… 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 correlated isotopic, chemical, and microstructural studies of individual presolar grains …
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Diffraction and Spectroscopy of Marine Calcite Biominerals: Insights into Structure and Geochemistry
… 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 structure (NEXAFS) spectra at the Na-edge do not …
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Physical and Chemical Properties of Matrix in Primitive Chondrites
… using Scanning Transmission X-ray Microscopy (STXM) which revealed predominantly oxidising conditions; some reducing conditions are also displayed by some grains, reflecting the mixed redox conditions of the solar nebula. Measurements of O-isotopic composition of matrix regions were performed, …
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Photochemical transformation of particulate organic carbon and its impact on mercury cycling in aqueous systems
… 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 binding to irradiated POM was not observed owing to a large increase in the …
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Entwicklung eines Rastermikroskopes für den Einsatz an Laborquellen im EUV Spektralbereich
Im Rahmen dieser Arbeit wird der Aufbau eines kompakten, mobilen Labor-Rastermikroskopes beschrieben. Das Mikroskop ist konzipiert für den Einsatz mit Strahlung aus dem extrem ultravioletten Spektrum und konnte bei 13 und 17 nm Wellenlänge erfolgreich getestet werden. Der Anwendungsbereich läßt …