Non-crystalline structures in the growth of silver nanoclusters

被引:7
作者
Baletto, F
Mottet, C
Ferrando, R
机构
[1] Univ Genoa, Dipartimento Fis, INFM, I-16146 Genoa, Italy
[2] Univ Genoa, Dipartimento Fis, CNR, CFSBT, I-16146 Genoa, Italy
[3] CNRS, F-13288 Marseille 9, France
关键词
D O I
10.1007/s100530170052
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The growth of nanometer-size free Ag clusters is studied by Molecular Dynamics simulations. The morphology transition from the icosahedron at the magic size of N = 55 atoms to the Marks truncated decahedron at N = 75 is analyzed in details, in order to single out kinetic trapping and entropic effects. At very low T, the cluster is kinetically trapped in an icosahedral structure, At intermediate T the transition takes place sharply at N similar or equal to 65. At higher T, the transition is smeared out and finally, around 550 K no transition is found because the 75 decahedron is melted.
引用
收藏
页码:25 / 28
页数:4
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