Anisotropic Growth of Metal Chains on Anisotropic Substrate
Based on the exchange mechanism of metal islands growth on anisotropic metal surfaces, the growth processes of anisotropic Cu islands on the anisotropic Pd (110) surface are investigated by Monte Carlo simulations with realistic growth model and physical parameters. The anisotropic diffusion and anisotropic sticking of Cu adatoms are included in the simulation model after being considered the anisotropy of Pd (110) surface and compared to the experiments. It is found that the larger diffusion rate along the  channels of Pd (110) surface gives rise to a slower growth rate of Cu island in this direction, unless special effect of the anisotropic sticking is invoked. The simulation results show that the shape anisotropy of Cu islands is mainly due to the sticking anisotropy rather than the diffusion anisotropy.
Chunli BAI, Sishen XIE, Xing ZHU
F. M. Wu and Y. Z. Fang, "Anisotropic Growth of Metal Chains on Anisotropic Substrate", Solid State Phenomena, Vols. 121-123, pp. 1129-1132, 2007