Engineering the architectural diversity of heterogeneous metallic nanocrystals

Yue Yu, Qingbo Zhang, Jianping Xie and Jim Yang Lee ()
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Yue Yu: National University of Singapore
Qingbo Zhang: National University of Singapore
Jianping Xie: National University of Singapore
Jim Yang Lee: National University of Singapore

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Similar to molecular engineering where structural diversity is used to create more property variations for application explorations, the architectural engineering of heterogeneous metallic nanocrystals (HMNCs) can likewise increase the versatility of metallic nanocrystals (NCs). Here we present a synthesis strategy capable of engineering the architectural diversity of HMNCs through rational and independent programming of every architecture-determining element, that is, the shape and size of the component NCs and their spatial arrangement. The strategy is based on the galvanic replacement reaction of a self-sustaining layer formed by underpotential deposition on a polyhedral NC. The selective deposition of satellite NCs on specific site of the central NC is realized by creating a geometry-dependent heterogeneous electron distribution. This site-selective deposition approach is applicable to central NCs in various polyhedral shapes and sizes. The satellite NCs can further develop their own shape and size through crystal growth kinetics control.

Date: 2013
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DOI: 10.1038/ncomms2474

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