▎ 摘　　要

Monte Carlo simulations are carried out for Zn cluster supported on a suspended graphene to estimate the morphological evolution of the following growth of ZnO nanostructure. The metal-metal interactions are modeled with the tight-binding many-body potential and a Lennard-Jones potential is used to describe the metal-carbon interactions. The dynamic processes of Zn cluster in the temperature field decomposing and drifting effects are visualized through the simulation. Zn atoms make one regular atomic single layer on the graphene sheet at a relatively low temperature, which would act as orderly and high density catalytic nucleation sites. In the relatively high temperature, the Zn atomic single layer falls to pieces, the orderly and low density catalytic nucleation sites are formed. It is expected from these behaviors that the buffer layer of graphene provide a sound explanation for the formation of ordered orientated ZnO nanostructure. (C) 2011 American Institute of Physics. [doi:10.1063/1.3537828]