Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (10): 3054.doi: 10.7503/cjcu20210153

• Analytical Chemistry • Previous Articles     Next Articles

Laser-mediated Enrichment Based Surface Enhanced Raman Analysis

TANG Wentao1, LI Shengkai1, WANG Shen1, CHEN Long2, CHEN Zhuo1()   

  1. 1.Molecular Science and Biomedicine Laboratory(MBL),State Key Laboratory of Chemo/Bio?Sensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China
    2.Faculty of Science and Technology,University of Macau,Macau 999078,China
  • Received:2021-03-08 Online:2021-10-10 Published:2021-10-10
  • Contact: CHEN Zhuo E-mail:zhuochen@hnu.edu.cn
  • Supported by:
    the Science and Technology Innovation Program of Hunan Province, China(2020RC4017);the Science and Technology Development Fund, Macau, China(196/2017/A3)

Abstract:

Surface enhanced Raman scattering(SERS) technique has extensive application prospects in biochemical analysis and environmental monitoring field owing to its high sensitivity, low background inter- ference, superior anti-photobleaching and anti-photocarbonization capabilities, as well as ability to reflect the inherent molecular fingerprint information of the analyte. Non-target analytes are competitively adsorbed on the surface of the SERS substrate, making the analysis of trace analytes in complex systems extremely challenging. Based on the self-assemble of the graphene-isolated Au nanocrystal(GIAN) with excellent SERS performance at H2O-Organic phase interface, the large partition coefficient of the analyte in organic phase, and GIAN can combine with the analyte viaπ-π interaction, a laser-mediated highly-efficient analyte enrichment strategy is proposed and trace SERS analysis of 9,10-bis(phenylethynyl)anthracene(BPEA) molecules is eventually realized in this work. The proposed novel analyte enrichment strategy avoids the signal fluctuation caused by the “coffee ring effect” to a certain extent and is expected to provide a reliable platform for SERS analysis of trace analytes in complex systems.

Key words: Laser-mediated enrichment, Surface enhanced Raman scattering, Two-phase interface, Graphene-isolated Au nanocrystal, Self-assembly

CLC Number: 

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