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Pristine samples of a polymer blend of polyvinylpyrrolidone (PVP)/ polyvinyl alcohol (PVA)/ chitosan lled with different concentrations of silver nanoparticles (AgNPs) were prepared using the casting method. The samples were then examined using various physical and antibacterial characterization techniques. Characterization studies showed that the blend provides a uniform and controlled distribution of AgNPs inside the polymeric matrix without the addition of any more stabilizers. The mean particle size for green and laser-ablated AgNPs was found to be 50 nm according to transmission electron microscopy (TEM) studies. Fourier transforms infrared (FTIR) studies showed the presence of characteristic main peaks corresponding to the vibrational groups which characterize the prepared samples. The interactions between the AgNPs and the blend were marked by changes in the intensity of vibrational peaks and spectral positions. X-ray diffraction (XRD) con rmed the structural modi cation within the PVP/PVA/chitosan matrix because of AgNPs lling. The change in the absorbance has been studied with the help of measured ultraviolet-visible spectroscopy (UV-Vis.) and therefore the optical band gap was calculated. The lling of AgNPs in the blend shows a broad peak at 427 nm because of the phenomenon of surface plasmon resonance (SPR) and its intensity increases with increasing ller concentration. The blend and the Ag-nanocomposite showed good antibacterial activity and caused a signi cant decrease in microbial growth (Escherichia coli) in 24 hours.

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