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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/045/0026

    • Keywords

       

      N-GQDs; fluorescent labelling; photoluminescence switching; inner filter effect.

    • Abstract

       

      In this study, we report a switchable fluorescence probe based on nitrogen-doped graphene quantum dots (N-GQDs) to detect the presence of tetracycline and L-Cystence. Strong blue emissive N-GQDs were successfullyprepared by the hydrothermal treatment of urea and benzophenone, with a quantum yield of 34.9%. Both transmission electron microscopy and atomic force microscope images reveal a nearly monodispersed N-GQDs with spherical morphologies, and provide evidences of 1–3 layered structures of N-GQDs. Meanwhile, the obtained N-GQDs can be utilized for fluorescent labelling due to their superior optical stability and favourable biological compatibility. A strong fluorescence quenching was observed for the presence of tetracycline. The following addition of L-Cysteine can motivate the regeneration of fluorescence. Therefore, a simple strategy for the detection of tetracycline and L-Cystence in natural water was developed due to the relevant sensitivity of N-GQDs nanosensor.

    • Author Affiliations

       

      FENG XIE1 TING WANG1 XIAMENG LI1 DA CHEN1 CHANGXING WANG1 GANG WANG1 XIAOHU ZHENG2 QINGLEI GUO3

      1. Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People’s Republic of China
      2. Beijing Academy of Quantum Information Sciences, Beijing 100090, People’s Republic of China
      3. Center of Nanoelectronics and School of Microelectronics, Shandong University, Jinan 250100, People’s Republic of China

    • Dates

       
      Published
      31 January 2022
      Manuscript received
      4 July 2021
      Accepted
      12 September 2021
      Final version published online
      31 January 2022

    • Supplementary Material

       

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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