Spontaneous atom mixing and unmixing in metallic nanoparticles
- 1 March 2000
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 80 (3) , 181-186
- https://doi.org/10.1080/095008300176317
Abstract
The behaviour of atom mixing and unmixing in metallic nanoparticles has been studied in situ by transmission electron microscopy, using particles in the Au2Pb-Sn system. It is confirmed that not only spontaneous mixing but also spontaneous unmixing take place in Au2Pb particles. At room temperature, spontaneous mixing of tin atoms into Au2Pb particles takes place, and this mixing induces unmixing of lead from Au2Pb, resulting in the formation of AuSn particles accompanied by lead precipitates.Keywords
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