MELTING OF SMALL GOLD PARTICLES - MECHANISM AND SIZE EFFECTS

被引：429

作者：

ERCOLESSI, F ^{[1
]}

ANDREONI, W ^{[1
]}

TOSATTI, E ^{[1
]}

机构：

[1] SCUOLA INT SUPER STUDI AVANZATI, I-34014 TRIESTE, ITALY

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.66.911

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present extensive molecular-dynamics simulations of small gold particles of N = 100-900 atoms. We use a many-body interatomic potential of proven accuracy for gold surfaces. Structural properties are determined with various annealing strategies. Our results provide for the first time a microscopic description of the melting transition of metal clusters, revealing in particular the formation of a liquid skin as precursor effect for N > 350. The experimentally observed sharp decrease of the melting temperature with decreasing size is recovered. Implications for larger sizes, as well as for other metals, are discussed.

引用

页码：911 / 914

页数：4