Polyaniline Ingrained Copper Oxide (PANI/CuO) Nanocomposites for Effective Electromagnetic Interference Shielding and Their Sensitive Detection of Dopamine

In this paper, the electrical conductivity characteristic of polyaniline (PANI) coated CuO nanocomposites of different wt% of CuO nanoparticles can be studied. The synthesis of PANI/CuO nanocomposites was done by in-situ chemical polymerization reaction. Spectroscopic characterizations were done using FTIR, SEM, TGA, XRD, and UV-Vis techniques. The presence of functional groups, surface morphology, and semi-crystalline nature of the sample can be confirmed by FTIR, SEM, and XRD studies. High thermal stability of the sample was confirmed by TGA studies. The frequency-dependent AC conductivity and dielectric attributes of nanocomposites studied at normal room temperature showed tunability with varying wt% of CuO indicating PANI/CuO (5%) exhibits high AC conductivity and dielectric constant values than (10% &15%). It can be observed that the presence of CuO in PANI affects EMI shielding. The synthesized nanocomposites showed excellent EMI Shielding effectiveness of-18.2 dB to-23.1 dB. The results indicate PANI/CuO nanocomposites utilized as potential shielding materials in X-Band. Also, the PANI/CuO/GC electrode expresses good sensing performance for Dopamine. Further PANI/CuO/GCE shows excellent long linear range, sensitivity, and LOD are 10 to 180 mu mol/L, 0.0153 and 3.666 and R2 2 is 0.9951. Also, this sensor shows repeatability and stability without leaching property.