Real time observation of the formation of hollow nanostructures through solid state reactions

Huang Yen Lai, Chun Wei Huang, Chung Hua Chiu, Chun Wen Wang, Jui Yuan Chen, Yu Ting Huang, Kuo Chang Lu, Wen-Wei Wu*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We demonstrate the formation of hollow nickel germanide nanostructures of Ni-Ge core-shell 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 °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-Ge core-shell 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.

Original languageEnglish
Pages (from-to)4348-4353
Number of pages6
JournalAnalytical Chemistry
Volume86
Issue number9
DOIs
StatePublished - 6 May 2014

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