In situ x-ray diffraction study of the thermal expansion of silver nanoparticles in ambient air and vacuum -: art. no. 151915

被引：42

作者：

Hu, JL ^{[1
]}

Cai, WP ^{[1
]}

Li, CC ^{[1
]}

Gan, YJ ^{[1
]}

Chen, L ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 15期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.1901803

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The thermal expansion behavior of silver nanoparticles in ambient air and vacuum was studied by in situ x-ray diffraction (XRD) measurement of the particles dispersed within mesoporous silica in the temperature range of 25-700 degrees C. It has been shown that thermal expansion coefficient of Ag nanoparticles in vacuum is about 0.6 x 10(-5)/degrees C, only near one fourth that of bulk silver (2.2 x 10(-5)/degrees C). However, the coefficient in air is about 1.7 x 10(-5)/degrees C, about 3 times as high as that in vacuum and close to the value of bulk Ag. These were explained in terms of Ag particles' surface energy, oxygen surface adsorption, and dissolution into lattice. This study is of importance in architectonics of future nanodevices. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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