Journal Article Patterson function air and He atmosphere atomic force microscopy bent crystals coherent nanobeam X-ray diffraction core–shell–shell nanowire diffraction imaging energy dispersive pnCCDs individual core–shell nanowires mechanical bending of Au nanowires micro Laue diffraction morphological and optical changes nano-focused X-ray beams nanoprobe X-ray exposure nanowire nanowires ozone-induced oxidation stacking faults strain investigation threefold rotational symmetry