Silver Ions Induce Lateral Etching of Gold Nanorods by K2PtCl4

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• 作者：Fang Xie ; Wei Ye ; HongYan Sun ; Shufang Kou ; Xia Guo
• 刊名：Langmuir
• 出版年：2015
• 出版时间：June 23, 2015
• 年：2015
• 卷：31
• 期：24
• 页码：6823-6828
• 全文大小：464K
• ISSN：1520-5827

文摘

Selective etching is significant for fabrication of novel nanostructures. Here silver ions are introduced to control the lateral etching of gold nanorods by K₂PtCl₄ in a hot solution, producing a number of dumbbell-like PtAu-Au thin gold nanorods. Silver ions control the selective deposition of the reduced Pt⁰ atoms, causing the selective etching of the unprotected Au. The middle diameter of the obtained dumbbell-like nanorods can be adjusted from 12 nm to <10 nm. It is believed that this is an effective method to reduce the diameter of gold nanorods.