TITLE

In situ x-ray diffraction study of the thermal expansion of silver nanoparticles in ambient air and vacuum

AUTHOR(S)
Jinlian Hu; Weiping Cai; Cuncheng Li; Yanjie Gan; Li Chen
PUB. DATE
April 2005
SOURCE
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p151915
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 °C. It has been shown that thermal expansion coefficient of Ag nanoparticles in vacuum is about 0.6×10-5/°C, only near one fourth that of bulk silver (2.2×10-5/°C). However, the coefficient in air is about 1.7×10-5/°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.
ACCESSION #
17185397

 

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