Electrochemical Sensing of Dopamine at Polyaniline- Fe3o4 Modified Glassy Carbon Electrode and their Excellent Electromagnetic Interference Shielding Properties

Abstract

In this work, Electrochemical detection of Dopamine and EMI Shielding behavior of PANI-Fe₃O₄ studied. The polyaniline doped Fe₃O₄ nanocomposite synthesized by in-situ polymerization. The spectroscopic characterization of samples carried out using various techniques such as FTIR, SEM, TGA and XRD techniques. The variation of EMI Shielding effectiveness of PANI- Fe₃O₄ studied with the help of Vector Network Analyzer in X-band region (8.2–12.4 GHz). The total EMI blocking efficiency for PANI sample found to be ~ -14 dB, and the blocking efficiency of PANI is found to be further improved with the embedment of Fe₃O₄ nanoparticles. Also the PANI/ Fe₃O₄/GC electrode express good sensing performance for Dopamine. Further PANI/ Fe₃O₄/GCE shows excellent long linear range, sensitivity and LOD are 100 to 1200 µM/L, 0.00143 and 66.666 and R² is 0.9978. Also this sensor shows repeatability and stability without leaching property.