Surface-enhanced Raman Scattering Effect of Silver Dendritic Nanostructures

VernacularTitle:树枝状银微纳结构的表面增强拉曼散射效应研究
Author: Shaoyun CHEN ; Yuan WANG ; Hui LIU ; Chenglong HU ; Xueqing LIU ; Jiyan LIU
Keywords: Surface-enhanced Raman scattering; Silver micro-nano structures; Electrochemical deposition; Hierarchical structure
From: Chinese Journal of Analytical Chemistry 2017;45(3):374-380
CountryChina
Language:Chinese
Abstract: The facile and efficient synthetic route for Ag dendritic nanostructures on Indium tin oxide ( ITO) via electrodeposition was reported. The results showed that the Raman intensities of rhodamine 6G ( R6G) decreased with decreasing the loading concentration, and even at a low concentration of 10-10 mol/L, the signatures of R6G in Raman spectrum were still clearly observed. It indicated that the Ag dendritic nanostructures exhibited high surface-enhanced Raman scattering ( SERS) sensitivity. Moreover, the relative standard deviation ( RSD ) of band at 610 cm-1 was calculated to be 12 . 1%, 12 . 0%, 11 . 7%, 10 . 9%, 13. 2% and 14. 3%, respectively, corresponding with the concentration of R6G from 10-5 mol/L to 10-10 mol/L, which revealed that the Ag dendritic nanostructures could provide abundant hot spots and exhibited excellent reproducibility. In addition, the SERS spectrum of 3-mercaptopropionic acid (3MPA) also could be detected when its concentration was 10-5 mol/L. This method offers an easy and low-cost way to prepare Ag dendritic substrates and makes SERS detection more practicable.