Enhanced thermal stability of gold and silver nanorods by thin surface layers

被引：64

作者：

Khalavka, Yuriy ^{[1
]}

Ohm, Christian ^{[1
]}

Sun, Litao ^{[1
]}

Banhart, Florian ^{[1
]}

Soennichsen, Carsten ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Chem Phys, D-55128 Mainz, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 35期

关键词：

TEMPERATURE; ENERGY;

D O I：

10.1021/jp075230f

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：

Using in situ transmission electron microscopy, we find that a carbon shell governs the morphological transitions of gold and silver nanorods upon heating. Encapsulated Ag nanorods show a surprising nonuniform sublimation behavior starting from one side and leaving behind the shell. Uncovered gold nanorods transform their shape to spheres well below the bulk melting temperature through surface diffusion, which is prevented by a thin carbon shell.

引用

页码：12886 / 12889

页数：4

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