Search for dissertations about: "energy-loss spectroscopy"
Showing result 1 - 5 of 47 swedish dissertations containing the words energy-loss spectroscopy.
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1. Electron Energy Loss Spectroscopy of III-Nitride Semiconductors
Abstract : This Licentiate Thesis covers experimental and theoretical investigations of the bulk plasmon response to different compositions and strain states of group III-nitride materials. Investigated materials were grown using magnetron sputtering epitaxy and metal organic chemical vapour deposition and studied by Rutherford backscattering spectrometry, X-ray diffraction, electron microscopy and electron energy loss spectroscopy (EELS). READ MORE
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2. Modeling Vibrational Electron Energy Loss Spectroscopy with the Frequency-Resolved Frozen Phonon Multislice Method
Abstract : Aberration correctors, improved monochromators, and better detectors have enabled exciting research with nanometer- and Ångstrom-scale resolution in the Scanning Transmission Electron Microscope (STEM). However the interaction of high-energy electrons with the many-body system of the sample is quite complex and hinders interpretation of experiments. READ MORE
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3. Valence Electron Energy Loss Spectroscopy of III-Nitride Semiconductors
Abstract : This doctorate thesis covers both experimental and theoretical investigations of the optical responses of the group III-nitrides (AlN, GaN, InN) and their ternary alloys. The goal of this research has been to explore the usefulness of valence electron energy loss spectroscopy (VEELS) for materials characterization of group III-nitride semiconductors at the nanoscale. READ MORE
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4. Directly exposed electron-detectors for electron energy-loss spectroscopy
Abstract : This thesis investigates the possibilities of using planar silicon-devices such as the photodiode array and the charge-coupled device (CCD) as directly exposed electron-detectors for electron energy-loss spectroscopy. The aim is to achieve an acceptable performance at low signal intensities, enabling single electron detection. READ MORE
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5. Fine Structure and semi ordered structures : Extended energy loss fine structure investigations of semi ordered materials
Abstract : This thesis is based on structure determinations of solid materials with Extended energy loss fine structure (EXELFS) analysis. In this method the ionisation edges of a material recorded in an electron microscope are studied. The focus is on different hard materials. READ MORE