Formation of an icosahedral structure during the freezing of gold nanoclusters: Surface-induced mechanism

被引：175

作者：

Nam, HS ^{[1
]}

Hwang, NM

Yu, BD

Yoon, JK

机构：

[1] Seoul Natl Univ, Sch Mat Sci & Engn, Ctr Microstruct Sci Mat, Seoul 151742, South Korea

[2] Korea Res Inst Stand & Sci, Taejon 305600, South Korea

[3] Univ Seoul, Dept Phys, Seoul 130743, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 27期

关键词：

D O I：

10.1103/PhysRevLett.89.275502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The freezing behavior of gold nanoclusters was studied by employing molecular dynamics simulations based on the semiempirical embedded-atom method. Investigations of the gold nanoclusters revealed that, just after freezing, ordered nanosurfaces with a fivefold symmetry were formed with interior atoms remaining in the disordered state. Further lowering of temperatures induced nanocrystallization of the interior atoms that proceeded from the surface towards the core region, finally leading to an icosahedral structure. These dynamic processes explain why the icosahedral cluster structure is dominantly formed in spite of its energetic metastability.

引用

页数：4

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