Abstract
Grain-boundary and interface migration during phase transformation in zinc oxide nanometre-gained polycrystals have been observed by dynamic highresolution transmission electron microscopy. The migration of a [21.0] tilt grain boundary was found to proceed by the shift of ledges corresponding to the structural units of the boundary. The phase transformed from a wurtzite to a zincblende structure after the migration of the interface. The interface migration also proceeded by the shift of ledges on it. The product of the lattice misfits at the grain boundary and interface along two directions was reduced from 5.2 to 1.0% after the grain-boundary migration and phase transformation.
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