International Journal of Nano Dimension (Int. J. Nano Dimens.) Synthesis and characterization of Polyvinyl Alcohol-Polypyrrole-Silver nanocomposite polymer films Volume 11 (2020) Issue 3, July 2020 2024 02 07 Synthesis and characterization of Polyvinyl Alcohol-Polypyrrole-Silver nanocomposite polymer films EN Dattatray Nerkar Department of Physics, Sathaye College, Dixit Road, Vile Parle (East), Mumbai 400057, India. https://orcid.org/0000-0001-8725-844X Madhav Rajwade Department of Physics, Sathaye College, Dixit Road, Vile Parle (East), Mumbai 400057, India. Suryakant Jaware Department of Physics, Sathaye College, Dixit Road, Vile Parle (East), Mumbai 400057, India. Milind Jog Kirti M. Doongursee College, Dadar (West), Mumbai 400028, India. Journal Article 2024 02 07 The present paper describes the preparation and characterization of Polyvinyl Alcohol-Polypyrrole-Silver Nanocomposite (PVA-PPy-Ag NC) films. The prepared films were conducting, freestanding, flexible, and robust. Silver nanoparticles (Ag NPs) were synthesized from an aqueous solution of silver nitrate using trisodium citrate as a reductant. The casting solution for the films was prepared by in-situ chemical oxidative polymerization of pyrrole. This was done in the presence of Polyvinyl Alcohol and suspension of pre-synthesized silver nanoparticles. The absorption band at 424 nm in UV-Visible Spectroscopy of silver nanoparticles confirmed the formation of Ag nanoparticles. Scanning Electron Microscopy (SEM) studies revealed that spherical Ag NPs were produced with an average size of ~ 25 nm. The morphological analysis of the synthesized PVA-PPy-Ag nanocomposite films was carried out using Transmission Electron Microscopy (TEM). It was observed in the TEM images that Ag nanoparticles were well dispersed and conjugated in the PVA-PPy matrix. The structure of the produced films was studied by Fourier transform infrared (FTIR) Spectroscopy and X-Ray Diffraction (XRD). X-ray diffraction analysis exhibited the crystalline nature of the silver nanoparticles with a face-centered cubic (fcc) structure. The synthesized PVA-PPy-Ag nanocomposite films can be further utilized as potential material for the fabrication of gas sensors.