Microchimica Acta

, 186:276 | Cite as

Nitrogen-doped graphene quantum dots coated with gold nanoparticles for electrochemiluminescent glucose detection using enzymatically generated hydrogen peroxide as a quencher

  • Peiyao Ran
  • Jinyi Song
  • Fangjing Mo
  • Jingling Wu
  • Pingkun Liu
  • Yingzi FuEmail author
Original Paper


Nitrogen-doped graphene quantum dots (N-GQDs) were prepared from dicyandiamide and then used as both an electrochemiluminescence (ECL) emitter and a reductant to produce gold nanoparticles (Au-N-GQDs) on their surface without using any reagent. In order to avoid resonance energy transfer, the Au-N-GQDs were stabilized with chitosan. Transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), UV-vis spectroscopy (UV-vis) and ECL methods were used to characterize the nanocomposite. The materials was placed on a glassy carbon electrode (GCE), and the ECL signals are found to be strongly quenched by hydrogen peroxide that is enzymatically produced by oxidation of glucose. With the applied typical potential of −1.7 V, the ECL of the Au-N-GQDs modified GCE decreases linearly in the 10 nM to 5.0 μM glucose concentration range, and the lower detection limit is 3.3 nM. The influence of H2O2 to the signal has been discussed and a possible mechanism has been presented.

Graphical abstract

Schematic presentation of the reduction of gold nanoparticles with nitrogen-droped graphene quantum dots (N-GQDs) to form Au-N-GQDs. They were used to detect glucose by electrochemiluminescence through a signal off strategy.


Doping heteroatoms Signal off Quench mechanism Chitosan Peroxydisulfate In situ reduction Metal complex Glassy carbon electrode Electrochemiluminescence 



This work is supported by the National Natural Science Foundation of China (No. 21272188).

Compliance with ethical standards

The author(s) declare that they have no competing interests.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  • Peiyao Ran
    • 1
  • Jinyi Song
    • 1
  • Fangjing Mo
    • 1
  • Jingling Wu
    • 1
  • Pingkun Liu
    • 1
  • Yingzi Fu
    • 1
    Email author
  1. 1.Key Laboratory of Luminescence and Real-Time Analysis (Southwest University), Ministry of Education, School of Chemistry and Chemical EngineeringSouthwest UniversityChongqingChina

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