树枝状银微纳结构的表面增强拉曼散射效应研究

引用本文: 陈韶云, 王圆, 刘辉, 胡成龙, 刘学清, 刘继延. 树枝状银微纳结构的表面增强拉曼散射效应研究[J]. 分析化学, 2017, 45(3): 374-380. doi: 10.11895/j.issn.0253-3820.160785 shu

Citation: CHEN Shao-Yun, WANG Yuan, LIU Hui, HU Cheng-Long, LIU Xue-Qing, LIU Ji-Yan. Surface-enhanced Raman Scattering Effect of Silver Dendritic Nanostructures[J]. Chinese Journal of Analytical Chemistry, 2017, 45(3): 374-380. doi: 10.11895/j.issn.0253-3820.160785 shu

树枝状银微纳结构的表面增强拉曼散射效应研究

江汉大学, 光电化学材料与器件教育部重点实验室, 化学与环境工程学院, 武汉 430056
基金项目:
本文系国家自然科学基金(No.51303066)和湖北省自然科学基金(No.2016CFB194)资助项目

摘要: 利用两电极电化学沉积法制备出一种树枝状银微纳结构基体。扫描电子显微镜(SEM)的表征结果证实所制备的银基体呈现出完整的树枝状结构，具有对称性的树枝和树干，且树叶清晰可见。实验结果表明，树枝状银微纳结构的表面增强拉曼散射(Surface-enhanced Raman scattering，SERS)可以检测到超低浓度的罗丹明6G(Rhodamine 6G，R6G，10^-10 mol/L)光谱信号，即树枝状银微纳结构作为SERS基体表现出较好的灵敏性；当R6G的浓度在10^-5~10^-10 mol/L范围依次降低一个数量级时，谱带610 cm^-1处的拉曼散射强度的相对标准偏差分别为12.1%，12.0%，11.7%，10.9%，13.2%和14.3%，表明所制备银基体的SERS“热点”(Hot spots)分布较均一，树枝状银微纳结构作为SERS基体具有较好的重现性；当低SERS活性的3-巯基丙酸(3-Mercaptopropionic acid，3MPA)的检测浓度为10^-5 mol/L时，利用树枝状银基体能检测到3MPA的SERS光谱，说明所制备的银基体对低活性物质也具有较好的SERS灵敏性。

关键词:

English

Surface-enhanced Raman Scattering Effect of Silver Dendritic Nanostructures

Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, China
Received Date: 27 October 2016
Revised Date: 15 December 2016
Fund Project:
This work was supported by the National Natural Science Foundation of China (No. 51303066) and the Natural Science Foundation of Hubei Province, China (No. 2016CFB194)

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.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

树枝状银微纳结构的表面增强拉曼散射效应研究

English

Surface-enhanced Raman Scattering Effect of Silver Dendritic Nanostructures

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树枝状银微纳结构的表面增强拉曼散射效应研究

English

Surface-enhanced Raman Scattering Effect of Silver Dendritic Nanostructures

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