Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (6): 1891.doi: 10.7503/cjcu20200827

• Physical Chemistry • Previous Articles     Next Articles

Electrodeposition Mechanism and Surface-enhanced Raman Spectroscopic Effect of Nano-sized Silver Layer

CHEN Feng(), CHENG Na, ZHAO Jianwei(), SONG Yitian, SUN Yanyan, LOU Xinli, TONG Xiayan   

  1. College of Materials and Textiles Engineering,Jiaxing University,Jiaxing 314001,China
  • Received:2020-11-22 Online:2021-06-10 Published:2021-06-08
  • Contact: CHEN Feng,ZHAO Jianwei E-mail:ChenFeng85@zjxu.edu.cn;jwzhao@zjxu.edu.cn
  • Supported by:
    the Natural Science Foundation of Zhejiang Province, China(LY19E090005);the Science and Technology Project of Jiaxing City, China(2020AD10017)

Abstract:

The electrodeposition mechanism of nano-sized silver layer with large area uniformity and smoothness was studied, the corresponding preparation process was optimized, and its application in surface- enhanced Raman spectroscopy(SERS) was explored. The result shows that the nucleation mechanism of electrodeposition transitions gradually from progressive one to instantaneous one with negative shift of electrode potential and the best effect of SERS was achieved under such conditions, current density is 1.0 A/dm2, area ratio of cathode to anode is 1∶10, electrodeposition temperature is 20—30 ℃. Under ideal conditions, the silver grains are oriented along the (111) plane, with the diameters mainly distributing between 6—11 nm from scanning electron microscopy. The prepared coating can be used as SERS active substrate with high sensitivity and low limit of detection(LOD), the LOD of R6G was determined to below 1.0×10-12 mol/L, the coating also can realize uniform Raman enhancement effect on a large scale at the same time, which shows great potential for alpplication.

Key words: Electrodeposition, Silver plating, Surface-enhanced Raman spectroscopy, Limit of detection

CLC Number: 

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