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Abstract: In this work, the gold nanoparticles (AuNPs) modified molecularly imprinted polymers (MIPs) sensing electrode towards bisphenol A has been made by electrochemical methods and molecular imprinting technique on the surface of the gold electrode substrate. SEM, TEM and electrochemical analysis were employed to characterize the films on electrode. The results show that the electrochemical deposition method can make the gold nanoparticles grow regularly and the obtained film uniform. AuNPs modified Au electrode has a three-dimensional structure on the surface, and part of gold nanoparticles can be found within the mosaic structure in the MIPs, which increases the surface conductivity of the electrode significantly. The signals response to bisphenol A show that the MIP-AuNPs-Au electrode has a 2.63 times higher response compared to the MIPs-Au electrode and its detection limit is 1.47 x 10-8 mol/L in detecting bisphenol A. Besides, the MIPs-AuNPs-Au electrode has a good selectivity towards bisphenol A and favorable stability.
Template and target information: bisphenol A
Author keywords: molecular imprinting sensor, Electrochemical deposition, gold nanoparticles, self-assembly, bisphenol A