Graphene quantum dots and Nafion composite as an ultrasensitive electrochemical sensor for the detection of dopamine

Pang, Pengfei, Yan, Fuqing, Li, Haizhen, Li, Haiyan, Zhang, Yanli, Wang, Hongbin, Wu, Zhan and Yang, Wenrong 2016, Graphene quantum dots and Nafion composite as an ultrasensitive electrochemical sensor for the detection of dopamine, Analytical methods: advancing methods and applications, vol. 8, no. 24, pp. 4912-4918, doi: 10.1039/c6ay01254j.

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Title Graphene quantum dots and Nafion composite as an ultrasensitive electrochemical sensor for the detection of dopamine
Author(s) Pang, Pengfei
Yan, Fuqing
Li, Haizhen
Li, Haiyan
Zhang, Yanli
Wang, Hongbin
Wu, Zhan
Yang, WenrongORCID iD for Yang, Wenrong orcid.org/0000-0001-8815-1951
Journal name Analytical methods: advancing methods and applications
Volume number 8
Issue number 24
Start page 4912
End page 4918
Total pages 7
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2016-06-28
ISSN 1759-9679
1759-9679
Summary A novel electrochemical sensor for highly sensitive and selective detection of dopamine (DA) was developed based on a graphene quantum dots (GQDs) and Nafion composite modified glassy carbon electrode (GCE). GQDs were synthesized by a hydrothermal approach for cutting graphene sheets into GQDs and characterized by TEM, UV-vis, photoluminescence, and FT-IR spectra. The GQDs had carboxyl groups with a negative charge, which not only provided good stability, but also enabled interaction with amine functional groups in DA through electrostatic interaction to enhance the specificity of DA. The interaction and electron communication between GQDs and DA can be further strengthened via π-π stacking force. Nafion was used as an anchoring agent to increase the robustness of GQDs on the electrode surface and sensor stability and reproducibility. The GQDs-Nafion composite exhibits a good linear range of 5 nM to 100 μM and a limit of detection as low as 0.45 nM in the detection of DA. The proposed electrochemical sensor also displays good selectivity and high stability and could be used for the determination of DA in real samples with satisfactory results. The present study provides a powerful avenue for the design of an ultrasensitive detection method for clinical application.
Language eng
DOI 10.1039/c6ay01254j
Field of Research 030302 Nanochemistry and Supramolecular Chemistry
030199 Analytical Chemistry not elsewhere classified
039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Royal Society of Chemistry
Persistent URL http://hdl.handle.net/10536/DRO/DU:30085358

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