Dynamic imaging of Ostwald ripening in copper oxide nanoparticles by atomic resolution transmission Electron microscope

摘要

Atomic resolution TEM images with respect to Ostwald ripening in CuxO NPs on graphene. All scale bars are 1 nm. a, b Crystallization in CuxO NPs from the amorphous phase during electron beam irradiation. The gap of acquisition time between a to b is about 6 s. b-d Ostwald ripening process between two CuxO NPs taken by 0.2 s time-series acquisition. e Crystallized CuxO NP with hexagonal lattice structures 10 s after taking d