fig9

Figure 9. (A) Orientation and size-dependent fracture of diamond nanoneedles. Reproduced with permission^[44]. Copyright 2019, Springer Nature. (B) Top: Elastic loading-unloading deformation process of the diamond along the [101] direction and the corresponding FEM simulations. Middle: The statistical tensile results of diamonds oriented along [100], [101] and [111] directions. Bottom: The relationship of uniaxial strain and calculated bandgap values along [111] direction shows that indirect-to-direct bandgap transition occurs around ~9% tensile strain. Reproduced with permission^[47]. Copyright 2020, The American Association for the Advancement of Science. (C) In-situ SEM tensile tests and postmortem TEM analysis of a single Si nanowire. Reproduced with permission^[43]. Copyright 2016, Science Advances.