▎ 摘　　要

Using supramolecular recognition capability of cucurbit[7]uril to create a novel electrochemical sensing platform was accomplished by self-assembly of cucurbit[7]uril on the surface of graphene-gold composites modified glassy carbon electrode. The graphene-gold composites consisted of electrochemically reduced graphene oxide-nafion matrix and anchored electrodeposited gold nanoparticles and the graphene-gold composites modified glassy carbon electrode (labelled as graphene-gold) were characterized by scanning electron microscopy and Raman spectrometer. Self-assembly of cucurbit[7]uril was achieved by immersing the graphene-gold electrode into cucurbit[7]uril solution and confirmed by Fourier transform infrared spectra, cyclic voltammetry and electrochemical impedance spectroscopy. Ferrocene and its derivatives served as the substrates, and the electrochemical responses of fabricated graphene-gold/cucurbit[7]uril electrode were evaluated. The results showed that the presence of cucurbit[7]uril increased the peak current, improved the reversibility of reaction and extended the recognition ability of the modified electrode.