Fig. 4: Nucleus coalescence on a low-angle GB.
From: In situ observation of coalescence of nuclei in colloidal crystal-crystal transitions
a The lattice directions of the two grains have a 5∘ misorientation angle labelled by the two white dashed lines. These two grains form a low-angle GB on their interface, which can be viewed as a chain of dislocations (⊥). b After an incubation time of t = 1160 s, two nuclei form on the dislocations of the GB. They are liquid at an early stage and then grow into triangle lattices in (c). Yellow dashed lines mark the lattice directions of two nuclei. d The two nuclei grow along the GB and merge. The colours in (a–d) represent the dynamic Lindemann parameter for each particle. Scale bar: 5 μm.
