Magic size effects of small Cu clusters diffusion on Ag(111) surface

作者：Wang Changqing; Wang Fei; Zhang Yongsheng; Sun Qiang; Jia Yu^*

来源：Applied Surface Science, 2012, 261: 873-879.

DOI：10.1016/j.apsusc.2012.08.078

• EAM potential
• Molecular dynamics
• Surface diffusion
• Cluster
• Magic size effect

Using embedded-atom-method (EAM) potential of Ag/Cu heterogeneous system, structural stabilities and diffusion behaviors of small Cu clusters on Ag (1 1 1) surface have been investigated by molecular dynamics studies. The binding energies, the effective diffusion barriers and the corresponding prefactors for Cu clusters have been calculated. Structural stabilities and the diffusion properties of small Cu clusters show significant magic size effects: the trimer and heptamer clusters with relatively higher effective diffusion barriers are more stable than the other sizes. Moreover, the dimer';s and trimer';s rotation mechanism have been investigated in this paper as well.

• 出版日期2012-11-15
• 单位郑州大学