高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (10): 3054.doi: 10.7503/cjcu20210153

• 分析化学 • 上一篇    下一篇

基于激光介导富集的表面增强拉曼分析

唐文涛1, 李圣凯1, 王昚1, 陈龙2, 陈卓1()   

  1. 1.湖南大学化学化工学院, 化学生物传感与计量学国家重点实验室, 分子科学与生物医学实验室, 长沙 410082
    2.澳门大学科技学院, 澳门 999078
  • 收稿日期:2021-03-08 出版日期:2021-10-10 发布日期:2021-10-10
  • 通讯作者: 陈卓 E-mail:zhuochen@hnu.edu.cn
  • 基金资助:
    湖南省科技创新计划项目(2020RC4017);澳门科技发展基金(196/2017/A3)

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)

摘要:

基于具有优异表面增强拉曼散射(SERS)性能的石墨烯隔离的金纳米晶(GIAN)能够在水-有机相界面自组装, 待测物分子在有机相中的分配系数较大以及GIAN能够通过π?π相互作用与待测物分子结合的优势, 构建了激光介导的待测物分子的高效富集策略, 进而实现了9,10-双苯乙炔基蒽(BPEA)分子的痕量SERS分析. 所构建的新型待测物分子高效富集策略在一定程度上避免了因“咖啡环效应”带来的信号波动, 有望为复杂体系中痕量待测物的SERS分析提供可靠的平台.

关键词: 激光介导的富集, 表面增强拉曼散射, 两相界面, 石墨烯隔离的金纳米晶, 自组装

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

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