罗丹明6G
合金
材料科学
拉曼光谱
纳米结构
表面增强拉曼光谱
成核
纳米技术
吸附
分子
化学工程
拉曼散射
化学
冶金
光学
物理化学
有机化学
物理
工程类
作者
Zhezhe Wang,Xin Wen,Feng Zhu,Lin Lin,Ruihua Liu,Pingping Huang,Guilin Chen,Feng Huang,Qi Wang
标识
DOI:10.1016/j.cej.2018.03.192
摘要
A simple approach combining electrochemical reaction self-assembly and photolithography has been proposed for the controlled and reproducible fabricating the highly ordered Au-Ag alloy arrays for SERS. The nucleation and growth processes of the Au-Ag alloy are adjusted easily via changing the applied voltage and reaction time to obtain the flower-like hierarchy nanostructure, which show the strongest SERS properties due to the wealthy Raman "hot spots" provided by the corners and edges in much-branched flower structure. Moreover, the maximum SERS is observed for the Au-Ag alloy with a small amount of Au (12%), which can lead to a charge separation and favor the probe molecules adsorption to the silver domains. By using these flower-like Au-Ag alloy arrays, the Rhodamine 6G (R6G) with the concentration of as low as 10−12M can be detected easily in this study, which would be very promising for the applications in biosensors and nanodevices with molecule-level detection.
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