Asymmetric Hollow Nanorod Formation through a Partial Galvanic Replacement Reaction
Asymmetric Hollow Nanorod Formation through a Partial Galvanic Replacement Reaction
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DOI：
10.1021/ja907640h
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发表时间：
2009-12-30
影响因子：
15
通讯作者：
Song, Hyunjoon
中科院分区：
文献类型：
--
作者：
Seo, Daeha;Song, Hyunjoon
通过部分电置换反应，首次从银 - 金 - 银异金属纳米棒制备出不对称单中空结构。由于在反应早期仅在银区域的一端随机产生单个凹坑，从而发生了C - 2对称性破缺。对反应动力学的精细控制还可在银区域的两端产生双中空结构。所得的单中空和双中空纳米棒在近红外区域呈现出特征性的消光。
An asymmetric single hollow structure was generated from Ag-Au-Ag heterometal nanorods by a partial galvanic replacement reaction for the first time. The C-2-symmetry breaking took place because of the random generation of a single pit on only one end of the silver domain at an early stage of the reaction. Careful control of the reaction kinetics could also yield a double-hollow structure on both ends of the silver domain. The resulting single- and double-hollow nanorods exhibited characteristic extinctions in the near-IR range.