Molecular dynamics study of 'contact epitaxy' in Ag clusters supported on a copper (001) surface

被引:9
作者
Wang, YX
Pan, ZY [1 ]
Ho, YK
Huang, Z
Du, AJ
Wei, Q
Xu, Y
机构
[1] Fudan Univ, Inst Modern Phys, Shanghai 200433, Peoples R China
[2] Acad Sinica, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
molecular dynamics simulation; contact epitaxy; Ag cluster; Cu surface;
D O I
10.1016/S0257-8972(02)00282-7
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this paper, the formation of heteroepitaxial interfacial layers was investigated by molecular dynamics simulation of soft silver particles landing on the (001) surface of single-crystal copper. In our simulations, the clusters Ag-13, Ag-55, Ag-147 and Ag-688 were chosen as projectiles. A small cluster will rearrange into an f.c.c. structure when it is supported on the substrate, due to the large value of its surface/volume ratio. Contact epitaxy appeared in large clusters. The characteristic structure of an epitaxial layer in large silver cluster shows the <111> direction to be the preferential orientation of heteroepitaxial layers on the surface because of the lattice mismatch between the cluster and the substrate. This was confirmed by studying soft landing events in other systems (Au/Cu and Al/Ni). (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:258 / 262
页数:5
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