Electron-irradiation-induced phase change in nanometer-sized Al2Au particles

被引：1
|
作者：
Lee, Jung-Goo [1 ]
Mori, Hirotaro [2 ]
机构：
[1] Korea Inst Mat Sci, Funct Mat Div, Chang Won 642831, Kyungnam, South Korea
[2] Osaka Univ, Res Ctr Ultrahigh Voltage Electron Microscopy, Osaka 5670047, Japan
来源：
SURFACE AND INTERFACE ANALYSIS | 2012年 / 44卷 / 11-12期
关键词：
electron irradiation; phase change; Al-Au; in-situ TEM; nanoparticles; DISPLACEMENT THRESHOLD ENERGIES; NANOPARTICLES; NI3AL;
D O I：
10.1002/sia.4992
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：
Electron irradiation effect on nanometer-sized Al2Au compound particles has been studied by using transmission electron microscopy. Particles of Al2Au compound smaller than about 10 nm in diameter were irradiated with 200-keV electrons at room temperature. Selective sputtering of Au atoms from Al2Au compound particles was so strong that particles of Al2Au with the CaF2 structure changed into particles of a-Al with the fcc structure. The same irradiation experiment was also carried out using nanometer-sized particles of AlAu with the B2 structure. However, no change in the AlAu particles could be observed after irradiation. It was revealed that the selective sputtering of Au atoms from the Al2Au compound particles under irradiation with 200-keV electrons can be attributed to both the unique CaF2- type structure and the size effect of particles. Copyright (C) 2012 John Wiley & Sons, Ltd.
引用
收藏
页码：1527 / 1530
页数：4
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