Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (3): 20210731.doi: 10.7503/cjcu20210731

• Analytical Chemistry • Previous Articles     Next Articles

Fabrication of Ag/Au Nanowires Array as a SERS Substrate for High-sensitivity Malachite Green Detection

XIA Dacheng1, ZHOU Rui1, TU Bo1, CAI Zhiwei1, GAO Nan1, JI Xiaoxu2, CHANG Gang1(), REN Xiaoming1(), HE Yunbin1()   

  1. 1.Key Laboratory for the Green Preparation and Application of Functional Materials,Ministry of Education,Hubei Key Laboratory of Polymer Materials,School of Materials Science and Engineering,Hubei University,Wuhan 430062,China
    2.School of Physics and Electronic Engineering,Nanyang Normal University,Nanyang 473000,China
  • Received:2021-10-19 Online:2022-03-10 Published:2021-12-02
  • Contact: CHANG Gang E-mail:changgang@hubu.edu.cn;renxm212@hub.edu.cn;ybhe@hubu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51672074);the Natural Science Foundation of Hubei Province, China(2019CFA006);the Program for Science and Technology Innovation Team in Colleges of Hubei Provience, China(T201901)

Abstract:

In this work, Au nanowires(Au NWs) array was prepared through a seed-mediated soft template growth method, in which the morphology and structure of the Au NWs array can be controlled by adjusting the growth temperature. Silver nanoparticles(Ag NPs) were modified on the Au NWs array cleaned with sodium borohydride (NaBH4) to prepare the silver/gold nanowires(Ag/Au NWs) array as the surface enhanced Raman scattering(SERS) substrate. The SERS performance of Ag/Au NWs array was investigated by testing rhodamine 6G(R6G), a Raman probe molecule. The results indicate that Ag/Au NWs array as SERS substrate showed high sensitivity, excellent signal homogeneity and good stability. In the detection of malachite green in water, Ag/Au NWs array exhibited low detection limit of 1×10-8 mol/L, and a wide linear range from 1×10-8 mol/L to 1×10-4 mol/L. In addition, NaBH4 can remove adsorbed molecules on Ag/Au NWs array without affecting SERS performance, which allowing the SERS substrate to be recyclable. Reliable recovery rate obtained in real sample tests indicate that Ag/Au nanowires array has great potential in SERS detection of malachite green in environmental water.

Key words: Array, Au nanowires, Malachite green, Surface enhanced Raman scattering(SERS)

CLC Number: 

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