Formation of rectangularly shaped Pd/Au bimetallic nanorods: evidence for competing growth of the Pd shell between the 110 and 100 side facets of Au nanorods.

Xiang, Yanjuan; Wu, Xiaochun; Liu, Dongfang; Jiang, Xingyu; Chu, Weiguo; Li, Zhiyuan; Ma, Yuan; Zhou, Weiya et al. · Nano Lett · 2006

basic_science · Level V

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Abstract

In this letter, we report the competing growth of a Pd shell on the {110} and {100} facets of Au nanorods (Au NRs). This results in the disappearance of unstable {110} facets and the formation of rectangularly shaped Pd/Au bimetallic nanorods that show only four stable {100} side surfaces. The energy minimization to a more stable morphology is believed to be the driving force for the formation of the rectangular shape of the Pd shell.

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