We report herein a novel label-free polyaniline (PANI) based bisphenol A (BPA) electrochemical sensor fabricated on a flexible polyethylene terephthalate (PET) substrate. The PANI layer was electrochemically deposited on a gold-coated PET substrate using the facile amperometric (current-time transient) technique. A thorough investigation of the PANI sensing layer was done using Raman spectroscopy and field emission scanning electron microscopy (FESEM) characterization techniques. The sensing properties of the implanted matrix for BPA detection were investigated through cyclic voltammetry (CV). The fabricated electrochemical sensor showed linearity in the concentration range of 0.05---5.0 µM, a higher sensitivity of ~ 56.69 A/M and a lower limit of detection (LOD) of ~ 1.06 nM. The sensor exhibited excellent flexibility and a better shelf life of 20 weeks. The results highlight the importance of PANI thin film as an attractive matrix for the realization of electrochemical sensor for BPA detection. All rights reserved, Elsevier.

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