▎ 摘　　要

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 timol/L to 400.0 timol/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.