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Citation: ZHAO Bo-Ru, SHEN Jing-Song, SUN Zhi, CHEN Feng, CHEN Zhi-Dong, ZHAO Jian-Wei. Preparation and Properties of Active Substrates for Surface Enhanced Raman Spectroscopic Analysis[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(2): 282-288. doi: 10.19756/j.issn.0253-3820.191352 shu

Preparation and Properties of Active Substrates for Surface Enhanced Raman Spectroscopic Analysis

1.
College of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001 China;
2.
Jiangsu Donghua Testing Technology Co. Ltd, Taizhou 214500, China;
3.
College of Materials Science and Engineering, Changzhou University, Changzhou 213100, China

Received Date: 25 June 2019
Revised Date: 31 October 2019

Fund Project: This work was supported by the Natural Science Foundation of Zhejiang Province, China (Nos. LY19B030006, LY19E090005) and the National Natural Science Foundation of China (Nos. 51861145202, 51802121)

The silver active substrates with average particle size of about 20 nm for surface-enhanced Raman spectroscopic analysis were prepared using cyanide-free electrochemical deposition method. The electrochemical deposition behavior of the system was studied by cyclic voltammetry at different scanning rates. The results showed that the electrodeposition process of silver was controlled by diffusion. With the increase of scanning rate, the oxidation peak slightly shifted positively, whereas the reduction peak had a significant negative shift. The result of scanning electron microscopy showed that the silver particles were fine, uniform, and regular in shape, and their size was (20±10) nm. Using methyl orange as a probe, the enhancement of Raman spectral signal with the silver-deposited substrate was investigated, and an enhancement factor of 5.2×10⁵ was obtained. The linear range for detection of rhodamine 6G was 1×10^-12-1×10^-6 mol/L, the correlation coefficient was 0.98, and the limit of the detection was lower than 1×10^-12 mol/L. Raman spectroscopy mapping also showed that the silver-deposited substrate had a uniform distribution.
- Silver deposited,
- Active substrate,
- Surface enhanced Raman scattering,
- Limit of detection
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