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Figure 4
(a) Rotation angle of the three orthogonal lattice planes (0002) (squares), [(0\overline{1}10)] (triangles) and [(2\overline{1}\,\overline{1}0)] (circles) during three-point bending of a ZnO NW with a diameter of 200 nm and a suspended length of 2.5 µm until failure. The inset shows SEM images before and after mechanical testing, confirming NW fracture. (b) Strain ([\varepsilon_{zz}]) and (c) stress ([\sigma_{x}], [\sigma_{y}] and [\sigma_{z}]) (of the lower NW facet) in the ZnO NW at the highest applied load of 5.79 µN, calculated by FEM simulations considering the same loading and positioning configuration as in the experiment. The z direction shows a high stress of 3 GPa at the loading point, while the x and y directions are clearly affected by the positioning of the NW along the trenches, with the stress near the embedded parts highest in the opposite parts of each region.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 4| August 2025| Pages 1149-1158
https://doi.org/10.1107/S1600576725003668
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