Fabrication of ultra-sensitive and selective dopamine electrochemical sensor based on molecularly imprinted polymer modified graphene@carbon nanotube foam

A new type of three-dimensional (3D) electrochemical sensor was prepared by combining carbon nanotubes on graphene foam (GF/CNT) with molecularly imprinted polymer (MIP), which affords simultaneous identification and quantification towards target compound. The hybrid sensor shows ultralow detection limit of 6.67 × 10−16 M (S/N = 3), wide range of 2 × 10−15 M to 1 × 10−12 M, and superb selectivity for dopamine (DA) detection. Keywords: Electrochemical sensor, Dopamine, Graphene network, Carbon nanotube, Molecularly imprinted polymer