Multi-Bragg Coherent X-ray Diffraction Imaging during in-situ Nano-indentation of twinned Au crystal.

Defects in crystals have a critical influence on the propertie of nanocrystals, where a single defect can completely change the properties. Due to the proximity
of surfaces, the energy and mobility of defects in nano-objects are borne to be very different from that of the bulk. We propose to perform in-situ nano-indentation
experiments, using a custom-built AFM, on single twinned Au crystals coupled with multi-Bragg Coherent X-ray diffraction Imaging (BCDI), simultaneously
measuring symmetric as well as asymmetric Bragg peaks that are sensitive to the different parts of the twinned crystal. The planned in-situ BCDI measurements
will allow for directly visualizing the influence of the twin boundary acting as dislocation source/sink or more or less permeable barrier.