Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5362382 | Applied Surface Science | 2008 | 5 Pages |
Abstract
Diffusions of small cluster Pt6 on Pt(1Â 1Â 1) surface and Cu6 on Cu(1Â 1Â 1) are studied by molecular dynamics simulation, respectively. The atomic interaction is modeled by the semiempirical potential. The results show that the diffusion processes in the two systems are far different. For example, on Pt(1Â 1Â 1) surface, the hopping of single atom and the shearing of two atoms of hexamer only occur on the adatom(s) adsorbed at B-step, while on Cu(1Â 1Â 1) surface they can appear on the adatom(s) either at A-step or B-step. To the concerted translation of the parallelogram hexamer, the anisotropy in the diffusion path is observed in the two systems, the mechanisms and then the preferential paths, however, are completely different. The reasons for these diffusion characteristics and differences are discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Jianxing Jiang, Peng Zhang, Yiqun Xie, Xijing Ning, Min Zhuang, Yufen Li, Jun Zhuang,