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Synthesis of shield-like singly twinned high-index Au nanoparticles.

Yue Yu, Qingbo Zhang, Jianping Xie, Xianmao Lu, and Jim Yang Lee

Nanoscale 3(4):1497-500 (2011) PMID 21384055

A new gold nanostructure--shield-like Au nanoparticles (NPs) with a single twin plane and high-index {hhl} facets--was discovered in a simple seed-mediated synthesis. The development of this new shape is believed to be due to the preferential adsorption of cetyltrimethylammonium cations (CTA(+)) on high-index facets and the coalescence of the NPs by the charge screening effect of NaCl. These shield-like Au NPs display some properties that are distinctively different from other types of Au NPs.

DOI: 10.1039/c1nr10053j
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