Trapeziform Ag Nanosheet Arrays Induced by Electrochemical Deposition on Au-Coated Substrate

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• 作者：Guangqiang Liu ; Weiping Cai ; Changhao Liang
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：August 2008
• 年：2008
• 卷：8
• 期：8
• 页码：2748-2752
• 全文大小：459K
• 年卷期：v.8,no.8(August 2008)
• ISSN：1528-7505

文摘

Trapeziform Ag nanoplate arrays are successfully fabricated on Au-coated silicon substrate by electrochemical deposition. The trapeziform Ag nanoplates are standing on the substrate and dispersed uniformly. The nanoplates are 1−2 μm in edge length and 40 nm in thickness. Further experiments have revealed that the presence of PVP in the electrolyte and low deposition current density together with the Au-coated substrate are indispensable to fabrication of such arrays. The formation of trapeziform Ag nanoplate arrays is attributed to selectively oriented nucleation of Ag and quasi-equilibrium preferential growth on the Au film-coated substrate. This study is of importance in vertical immobilization Ag nanoplates on a solid substrate, which could provide new substrates for some catalysis or surface-enhanced Raman scattering.