Fig. 6. (a–c) The atomic structure of the penta-twinned Cu NW under ε zz = 0%, 8% and 8.25%. Only the twin boundaries and other lattice defects are shown. (d) Overpotential on the NW edge and (001) facet as functions of uniaxial tension ε zz. The green horizontal line indicates the overpotential on the Cu (211) surface.
