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

VernacularTitle:柔性石墨烯平面电极对多巴胺的灵敏检测
Author: Zi-Jie DONG ¹ ; Pu ZHANG ; She-Hong LI ; Hong-Xia LUO
Author Information

1. 中国人民大学化学系
Keywords: Graphene platform electrode; Electrochemical sensor; Gold nanoparticles; Dopamine
From: Chinese Journal of Analytical Chemistry 2018;46(7):1039-1046
CountryChina
Language:Chinese
Abstract: 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.