Figure 4: Dislocation migration in a high-angle 22° grain boundary.
From: Dislocation motion and grain boundary migration in two-dimensional tungsten disulphide
A sequence of ADF-STEM images showing the migration of the dislocation cores in a 22° GB (a–d) with their corresponding structural models (e–h). One 4|6 and two 6|8 dislocations (a) further migrate through glide and climb (b). 10 s later, two side-by-side 6|8s (c) recombine to form a 6|6|8 dislocation (d). The green arrows in e show the crystal vectors for the pristine lattice, whereas the blue and orange arrows indicate two Burgers vectors (1, 0) and (1, −1) (equivalent to (0, 1)) for 6|8 and 4|6, respectively. The scale bars are 7 Å.
