BF and HRTEM images of approximately 110° kinks in different NWs. (a, c, e) BF images of 110° kinks. Insets in (a) and (c) are SAED patterns corresponding to the selected areas. Clear contrast changes are indicated by white arrows in (e). (b, d, f) are HRTEM images corresponding to the selected areas in (a), (c), and (e) separately. SFs are observed in the kink area in (b). In (d), SFs and twins are shown in the adjacent region to the kink. Large numbers of SFs are observed along the growth direction shown in (f), while twins were observed in the kink area.