• 文献标题:   Highly sensitive and selective detection of dopamine with boron and sulfur co-doped graphene quantum dots
  • 文献类型:   Article
  • 作  者:   CHATTERJEE M, NATH P, KADIAN S, KUMAR A, KUMAR V, ROY P, MANIK G, SATAPATHI S
  • 作者关键词:  
  • 出版物名称:   SCIENTIFIC REPORTS
  • ISSN:   2045-2322
  • 通讯作者地址:  
  • 被引频次:   11
  • DOI:   10.1038/s41598-022-13016-4
  • 出版年:   2022

▎ 摘  要

In this work, we report, the synthesis of Boron and Sulfur co-doped graphene quantum dots (BS-GQDs) and its applicability as a label-free fluorescence sensing probe for the highly sensitive and selective detection of dopamine (DA). Upon addition of DA, the fluorescence intensity of BS-GQDs were effectively quenched over a wide concentration range of DA (0-340 mu M) with an ultra-low detection limit of 3.6 mu M. The quenching mechanism involved photoinduced electron transfer process from BS-GQDs to dopamine-quinone, produced by the oxidization of DA under alkaline conditions. The proposed sensing mechanism was probed using a detailed study of UV-Vis absorbance, steady state and time resolved fluorescence spectroscopy. The high selectivity of the fluorescent sensor towards DA is established. Our study opens up the possibility of designing a low-cost biosensor which will be suitable for detecting DA in real samples.