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Abstract: A novel electrochemical sensor based on Pt@molecularly imprinted polymer (MIP) core-shell nanostructure was developed using a facile electrodeposition method. This unique core-shell nanostructure offered the advantages of large electrode surface area, regular morphology, high selectivity and sensitivity. The poly(3, 6-diamino-9-ethylcarbazole) based MIP shell acted as the recognition element, while the inner Pt nanoparticles acted as a catalytic center. The morphology of the core-shell nanostructure was observed by scanning electron microscopy and the electrochemical property was evaluated using cyclic voltammetry. The sensing performance of the Pt@MIP sensor was investigated using the analyte of bisphenol A (BPA). Influence of the polymerization conditions on the performance of the Pt@MIP sensor was investigated. Under the optimized condition, a wide linear range (0.007 μM ~ 70 μM), a low detection limit (0.0032 μM) and a good selectivity were obtained for the detection of BPA. Finally, the sensor was applied to the detection of BPA in serum and drinking bottle samples with satisfying results
Template and target information: bisphenol A, BPA
Author keywords: Electrochemical sensor, Core-shell structure, molecularly imprinted polymer, Pt nanoparticles, bisphenol A