Direct observation of dynamic shape transformation and coalescence in platinum nanosheets on graphite surface at room temperature by time-resolved AFM

被引：5

作者：

Kawasaki, Hideya ^{[1
]}

Sakai, Go

Kijima, Tsuyoshi

机构：

[1] Kyushu Univ, Grad Sch Sci, Dept Chem, Fukuoka 8128581, Japan

[2] Miyazaki Univ, Fac Engn, Dept Appl Chem, Miyazaki 8892192, Japan

来源：

APPLIED SURFACE SCIENCE | 2006年 / 253卷 / 03期

关键词：

nanocrystalline materials; self-assembly; thin films; metals; surfactants;

D O I：

10.1016/j.apsusc.2006.02.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The shape transformation of platinum (Pt) nanosheets with a uniform thickness of as thin as 3.5 +/- 1 nm supported on graphite was investigated by in situ atomic force microscopy (AFM). The AFM observations revealed the shape transformation and the coalescence in preferred directions for the Pt nanosheets at room temperature (25 degrees C), which is much lower than the melting point of bulk metallic platinum (1769 degrees C). The behavior may be attributed to the high surface energy for the edge parts of Pt nanosheets with the small curvature of the nanometer scale. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1512 / 1516

页数：5

共 30 条

[1] Diffusion and aggregation of large antimony and gold clusters deposited on graphite [J].