Double-potentiostatic electrodeposition of Ag nanoflowers on ITO glass for reproducible surface-enhanced (resonance) Raman scattering application

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• 作者：Juncao Bian ; Zhe Li ; Zhongdong Chen ; Xiwen Zhang ; ^{zhangxw@zju.edu.cn} ; Qian Li ; Shan Jiang ; Junhao He ; Gaorong Han
• 关键词：Ag nanoflowers ; Double-potentiostatic method ; Electrodeposition ; SE(R)RS ; Reproducibility
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：15 April, 2012
• 卷：67
• 期：Complete
• 页码：12-17
• 文件大小：1588 K

摘要

Herein, we first report electrodeposition of dense (1.3脳  10⁹ cm^鈭?) and uniform (RSD of size is about 11%) Ag nanoflowers on ITO glass by a double-potentiostatic method without any surfactant. Raman spectra showed that the Ag nanoflowers with multiple petals on ITO glass exhibited excellent SER(R)S ability. It could accommodate a considerable range of sample concentrations (10^鈭?0 M at least for rhodamine 6G). The smallest RSD of the intensities for 1651 cm^鈭? Raman band of rhodamine 6G was about 14.1%, indicating good reproducibility. Through the time-dependent morphological evolution investigation and high-resolution transmission electron microscopy (HRTEM) analysis, the formation of petals was ascribed to the slow reduction rate and high nucleation driving force by electrical field concentration.