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Controllable Electrochemical Synthesis of Silver Dendritic Nanostructures and Their SERS Properties
Xun Hong,Guan-zhong Wang*,Ying Wang,Wei Zhu,Xiao-shuang Shen
Author NameAffiliationE-mail
Xun Hong Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Guan-zhong Wang* Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China gzwang@ustc.edu.cn 
Ying Wang Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Wei Zhu Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Xiao-shuang Shen Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Abstract:
Ag dendritic nanostructures were synthesized on fluorine-doped tin oxide covered glass sub-strates by the electrodeposition method. Results demonstrate that the size, diameter, crys-tallinity, and branch density of the Ag dendrites can be controlled by the applied potential,the surfactants and the concentration of AgNO3. Three kinds of typical silver dendrites were applied as substrates of the surface enhanced Raman scattering (SERS) and one of them was able to clearly detect rhodamine 6G concentrations up to 0.1 nmol/L. The differences of the SERS spectra at these Ag dendrites confirmed that the shapes and interparticle spacings have great effect on Raman enhancement, especially the interparticle spacings.
Key words:  Silver, Dendritic nanostructure, Electrodeposition, Surface enhanced Raman scattering
FundProject:
树枝状银纳米结构的可控电化学合成及其SPR/SERS性质
洪勋,王冠中*,王颖,祝巍,沈小双
摘要:
采用电化学沉积的方法在导电玻璃衬底上合成出树枝状的银纳米结构. 通过调控电位、表面活性剂、硝酸银浓度等参数控制树枝状银纳米结构的尺寸、直径、结晶性和分枝密度. 三种典型的树枝状银纳米结构被用来做表面增强拉曼散射衬底,其中的一种可以清楚的探测浓度低于0.1 nmol/L的若丹明6G分子. 不同树枝状银纳米结构表面增强拉曼效果相差比较大,说明了分枝颗粒形状,特别是颗粒间距对表面增强拉曼散射有非常重要的影响.
关键词:  银,树枝状纳米结构,电沉积,表面增强拉曼散射
DOI:10.1088/1674-0068/23/05/596-602
分类号: