X-ray Photon Correlation Spectroscopy (XPCS) is a coherent X-ray scattering technique enabling to probe dynamics based on observations of fluctuations in the intensity of coherent X-ray speckles. XPCS has contributed to address important questions in soft matter and biomolecular condensates such as phase separation in protein solutions, colloidal microscopic organization during gelation,...
Ever since the discovery of X-rays, tremendous efforts have been made to develop new imaging techniques for unlocking the hidden secrets of our world and enriching our understanding of it. X-ray differential phase contrast imaging, which measures the gradient of a sample’s phase shift, can reveal more detail in a weakly absorbing sample than conventional absorption contrast. However, normally...
Lensless X-ray coherent diffraction imaging (CDI), facilitated by ptychography, has emerged as a thriving field with promising applications in materials and biological sciences with a theoretical imaging resolution only limited by the X-ray wavelength. Most small-angle scattering based CDI methods use transmission geometry, which has limitations for studying nanostructures grown on opaque...
X-ray ptychographic microscopy and computed tomography are indispensable non-invasive materials characterization methods for studying the internal structures of solids in many fields, from chemistry, catalysis, and material science to cultural heritage, with the improvement of X-ray sources, such as the upgrade of 3rd and construction of 4th generation synchrotrons, X-ray ptychography...
Fluctuations and stochastic processes are ubiquitous in nanometer-scale systems, especially in the presence of disorder. Real-space access to fluctuating states is impeded by a fundamental dilemma between spatial and temporal resolution. Averaging over an extended time period (or repetitions) is key for the majority of high-resolution imaging experiments. If, by lack of better knowledge,...
Mechanical loading experiments of flat sheet materials allow investigating a broad range of stress triaxialities, including non-proportional loading. This is highly relevant for the understanding of fracture mechanisms under engineering-relevant conditions [1, 2, 3].
In this context, X-ray computed laminography (CL) [4] has proven to be a unique and powerful tool for the non-destructive 3D...
