Interface-dominated galvanic replacement reactions in the Zn/Cu 2+ system

Liu, Hui, Li, Jia-Jun, Kulinich, Sergei A., Li, Xiang, Qiao, Shi Zhang and Du, Xi-Wen (2012) Interface-dominated galvanic replacement reactions in the Zn/Cu 2+ system. Nanotechnology, 23 36: 365601.1-365601.8. doi:10.1088/0957-4484/23/36/365601

Author Liu, Hui
Li, Jia-Jun
Kulinich, Sergei A.
Li, Xiang
Qiao, Shi Zhang
Du, Xi-Wen
Title Interface-dominated galvanic replacement reactions in the Zn/Cu 2+ system
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
Publication date 2012-09-14
Sub-type Article (original research)
DOI 10.1088/0957-4484/23/36/365601
Open Access Status
Volume 23
Issue 36
Start page 365601.1
End page 365601.8
Total pages 8
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Abstract Galvanic replacement (GR) reactions involving active-metal nanoparticles (NPs) as seeds have a number of distinctive features and can produce various noble-metal nanoparticles. The oxide layer on the surfaces of such active-metal seeds may make a remarkable impact on the final products. Taking the Zn/Cu 2+ system as a model, we show that the GR reaction of pure Zn seeds with Cu 2+ ions leads to Cu nanodendrites, while oxide-covered Zn seeds result in ultrafine Cu NPs. We demonstrate here that the oxide layer does not block the GR reaction but slows down its rate. We also show that the growing Cu NPs can eventually detach from their ZnO substrate because of poor adhesion and disperse in the reaction liquid very well. Our studies provide detailed information on mechanisms of the GR reaction involving active-metal seeds, and therefore may be useful for further control of the morphology and properties of products prepared via this approach.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
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