Browsing Fakultät für Physik (inkl. GAUSS) by Advisor "Salditt, Tim Prof. Dr."
Now showing items 1-20 of 36
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3d virtual histology of neuronal tissue by propagation-based x-ray phase-contrast tomography
(2018-07-05)Deciphering the three-dimensional (3d) cytoarchitecture of neuronal tissue is an important step towards understanding the connection between tissue function and structure and determining relevant changes in neurodegenerative ... -
A Dedicated Endstation for Waveguide-based X-Ray Imaging
(2012-08-30)X-ray microscopy has emerged as a powerful and versatile imaging technique in many fields of science over the last years, offering insights in opaque media at high spatial resolution. A major challenge remains the ... -
A matter of brightness: table-top X-ray generation inside waveguides and X-ray holography with single free-electron laser pulses
(2022-03-22)X-ray microscopy delivers insights into the structure of optically opaque bulk specimens with high spatial resolution. The source brightness poses a limit on the achievable resolution, however. While table-top X-ray sources ... -
A waveguide-based lens-less x-ray microscope
(2006-09-05)A lot of effort is currently invested to realize phase contrast imaging with hard x-rays. For specimen consisting of light elements, e.g. biological samples, the induced phase shift of the ... -
Advanced x-ray multilayer waveguide optics
(2017-09-12)The aim of this thesis is to demonstrate that x-ray waveguide optics can be gen- eralized from a single guiding film to an array of planar waveguides, enabling more complex and controllable phenomena of field propagation ... -
Coherent X-Ray Diffractive Imaging on the Single-Cell-Level of Microbial Samples:
(2014-12-17)Since its first experimental demonstration in 1999, Coherent X-Ray Diffractive Imaging has become one of the most promising high resolution X-Ray imaging techniques using coherent radiation produced by brilliant synchrotron ... -
Collective Short Wavelength Dynamics in Phospholipid Model Membranes - with Inelastic Neutron Scattering
(2009-07-20)Phospholipid membranes often serve as simple model systems to understand basic properties of their far more complex biological counterparts. One of the most significant aims in membrane ... -
Cone-beam x-ray phase-contrast tomography for the observation of single cells in whole organs
(2015-11-10)X-ray imaging enables the nondestructive investigation of interior structures in otherwise opaque samples. In particular the use of computed tomography (CT) allows for arbitrary virtual slices through the object and 3D ... -
Diffusion processes in membranes containing coexisting domains investigated by Fluorescence Correlation Spectroscopy
(2004-01-29)The aim of this study is to link domain and microdomain formation to diffusion behaviour in artificial planar membranes using Fluorescence Correlation Spectroscopy (FCS) and Monte Carlo ... -
Fast STED Microscopy
(2010-02-12)The spatial resolution of optical far-field microscopes was hampered by diffraction until STED microscopy broke the diffraction limit. This thesis for the first time combines the high spatial ... -
Functional Domain Motions and Processivity in Bacterial Hyaluronate Lyase
(2007-08-02)Processive enzymes are a special class of enzymes which presumably remain attached to their polymeric substrates between multiple rounds of catalysis. Due to this property, the substrate ... -
Hard X-ray Waveguide Optics
(2005-11-18)The thesis is about the preparation of intense hard X-ray nanobeams focusing on the use of X-ray waveguides in resonant beam coupling and front coupling geometry. -
Herstellung von Optiken für weiche Röntgenstrahlung und deren Charakterisierung an Labor- und Synchrotronstrahlungsquellen
(2012-03-29)Within the last decades soft X-ray microscopy methods win increasing importance. Labratory-scale laser-induced plasma sources make this radiation available to a larger community of researchers ... -
Hochauflösende Bildgebung und NEXAFS-Spektroskopie mit weicher Röntgenstrahlung aus laserinduzierten Plasmen
(2019-01-24)Soft x-ray microscopy and absorption spectroscopy are extremely useful tools for high-resolution imaging and chemical analysis of samples in various scientific fields. However, due to the required high photon flux of ... -
Kinetics of Domain Formation Processes in Lipid Membranes
(2006-05-30)In the vicinity of melting transitions in membranes, fluctuations in enthalpy, volume, area and concentration approach a maximum. Consequences are the formation of domains, increasing elastic ... -
Multiscale X-Ray Analysis of Biological Cells and Tissues by Scanning Diffraction and Coherent Imaging
(2018-12-13)The past 70 years of muscle research have profoundly shaped our current understanding of the structure and function of muscle. X-ray diffraction became a key method in its structural analysis and yielded valuable insights ... -
Phase retrieval for object and probe in the optical near-field
(2016-01-12)Lensless, holographic X-ray microscopy is a non-invasive imaging technique that provides resolution on the nanometer scale. Therefore, a divergent, coherent and especially clean wavefront impinging on the sample is needed. ... -
Protein precipitates, aggregation kinetics and membrane protein receptors characterized by solid-state NMR
(2008-10-01)This work addresses the investigation of insoluble, biomolecular systems using nuclear magnetic resonance (NMR). Introducing novel areas of applications an atomic picture of the precipitated ... -
Scanning X-Ray Nanodiffraction on Dictyostelium discoideum
(2015-11-06)In the recent years, novel focussing optics for synchrotron radiation sources became available, which now allow focussing the x-radiation down to 100\,nm (FWHM). Thus, the typically poor spatial resolution of Small Angle ... -
Soft X-ray stereo microscopy for investigation of dynamics and elemental distribution of colloidal systems from the environment
(2010-03-12)Soil colloids are classified to be in a size range of 1nm to 1μm. Their huge specific surface determines the interactions of the soil colloids, which differ from the behaviour of the same ...