Real Time Observation of the Formation of Hollow Nanostructures through Solid State Reactions
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- 作者：Huang-Yen Lai ; Chun-Wei Huang ; Chung-Hua Chiu ; Chun-Wen Wang ; Jui-Yuan Chen ; Yu-Ting Huang ; Kuo-Chang Lu ; Wen-Wei Wu
- 刊名：Analytical Chemistry
- 出版年：2014
- 出版时间：May 6, 2014
- 年：2014
- 卷：86
- 期：9
- 页码：4348-4353
- 全文大小：401K
- 年卷期：v.86,no.9(May 6, 2014)
- ISSN：1520-6882
文摘
We demonstrate the formation of hollow nickel germanide nanostructures of Ni鈥揋e core鈥搒hell nanoparticles by solid state reactions. The structural evolutions of nickel germanide hollow nanostructures have been investigated in real-time ultrahigh vacuum transmission electron microscopy (UHV-TEM). Annealed above 450 掳C, the nonequilibrium interdiffusion of core and shell species occurred at the interface; thus, Ni germanide hollow nanostructures were formed by solid state reactions involving the Kirkendall effect. In addition, the different hollow nanostructures formed from different core diameters of Ni鈥揋e core鈥搒hell nanoparticles have been studied. Also, we propose the mechanism with effects of the size and annealing duration on the solid state reactions based on the Kirkendall effect.