Citation: DONG Zi-Jie, ZHANG Pu, LI She-Hong, LUO Hong-Xia. Flexible Graphene Platform-based Electrochemical Sensor for Sensitive Determination of Dopamine[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(7): 1039-1046. doi: 10.11895/j.issn.0253-3820.171425 shu

Flexible Graphene Platform-based Electrochemical Sensor for Sensitive Determination of Dopamine

Department of Chemistry, Renmin University of China, Beijing 100872, China

Received Date: 15 November 2017
Revised Date: 15 March 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21575160).

The chemical vapor deposition grown graphene was transferred onto flexible polyethylene terephthalate surface to fabricate a graphene platform electrode (GPE), and gold nanoparticles (AuNPs) were electrodeposited on GPE to form an AuNPs modified GPE (AuNPs/GPE). The formation of AuNPs was confirmed by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), high-resolution transmission electron microscope (HR-TEM), X-ray diffraction (XRD) and Raman spectra. On AuNPs/GPE, dopamine (DA) displayed a pair of well-defined redox peaks with highly enhanced peak currents compared with those on GPE. At detection potential of 0.20 V, AuNPs/GPE sensor presented a wide linear range of 0.1 μmol/L to 400.0 μmol/L of DA with a detection limit of 3.9 nmol/L (S/N=3). In addition, the proposed sensor allowed highly selective and sensitive, stable and fast amperometric sensing of DA.
- Graphene platform electrode,
- Electrochemical sensor,
- Gold nanoparticles,
- Dopamine
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