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 7 of 7 for “"x-ray photon correlation spectroscopy"”.
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X-ray photon correlation spectroscopy studies of the dynamics of self-assembling block copolymer structures
… presented to the emerging technique of X-ray Photon Correlation Spectroscopy. These improvements enabled the study of polymer structures, in particular isotropic sponge phases of homo-polymer block copolymer mixtures. An analysis is presented on how to optimize the experimental beamline …
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X-ray induced temperature dependent amorphous-amorphous transitions in the GeO2 glass
… thesis investigates the effects of intense X-ray irradiation on vitreous germanium dioxide (v-GeO2), a prototypical strong oxide glass, by combining X-ray photon correlation spectroscopy (XPCS), X-ray diffraction (XRD), and inelastic X-ray scattering (IXS). The results demonstrate that intense …
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Dynamical perspective of stability in glasses
… with thermo-mechanical treatments including X-ray irradiation and high-pressure compression. Vibrational dynamics are characterized through the vibrational density of states measured by Nuclear Resonant Analysis of Inelastic X-ray Scattering and Raman spectroscopy, while slow relaxation …
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Zeitabhängige Phänomene in athermischen Formgedächtnislegierungen
… and the Au52.5Cd47.5 sample shows the strongest correlation in fluctuation behavior. These assertions are possible due to the high number of measurement points compared to previous studies. For the first time measurements of the current value of Ms are carried out in between the incubation time …
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The yielding transition in soft materials
… experiments were performed with simultaneous X-ray scattering. By utilizing X-ray photon correlation spectroscopy (XPCS) to analyze the scattering results in a time-resolved manner, the rheological deformations can be connected to the instantaneous dynamics of the material. Through these …
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The effect of intense x-ray beams on oxide glasses unveiled by means of photon correlation spectroscopy
… we aim to study the structural evolution under x-ray illumination in a selection of oxide glass formers as a function of the radiation dose. The irradiated specimens are investigated by means of XPCS experiments and also by means of “exsitu” experiments as luminescence, Raman and x-ray diffraction …
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Microplasticity in metallic glasses
… and therefore shear banding. We use a coherent x-ray scattering technique (x-ray photon correlation spectroscopy or XPCS) to probe the lower stress range, whereas an in-situ acoustic emission (AE) technique is used to track structural activity close to yielding. As a first experiment, XPCS has …