A sensitive dopamine(DA) electrochemical sensor was constructed using a gold nanoparticles-grafted terminally polyaniline composite (PANI/Au).The PANI/Au-modified electrode showed excellent electrocatalytic activity for DA oxidation recorded by differential pulse voltammetry (DPV).Analysis of DPV performance for PANI/Au-modified electrode showed a wide bilinear response of 1～200 and 0.01～1μM,a low limit of detection (LOD) of 0.01μM,and outstanding anti-interference and stability.The excellent performance of PANI/Au composite provided a new choice for the fabrication of advanced PANI-based DA sensors with enhanced electrochemical activity.
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