University of Kashan Journal of Nanostructures 2251-7871 14 2 2024 04 01 Enhancement the Structural and Electrical Properties of PVA by the Additive of Y2O3 and SrCO3 Nanoparticles and Apply as the Antibacterial 481 491 114502 10.22052/JNS.2024.02.010 EN Ali Salim Jwad Department of Physics, College of Education for Pure Sciences, University of Babylon, Babylon, Iraq Ali Razzaq Abdulridha Department of Physics, College of Education for Pure Sciences, University of Babylon, Babylon, Iraq Journal Article 2024 01 24 This work describes how to use the solution casting method to add varying amounts (0, 1, 2, 3, and 4) of Y<sub>2</sub>O<sub>3 </sub>and SrCO<sub>3</sub> nanoparticles (NPs) to polyvinyl alcohol (PVA) composites. The optical microscopy images showed the formation of networked channels inside the polymeric matrix as electrically charged particles, which became more intense at higher nanoparticle concentrations. With the use of field emission scanning electron microscopy (FESEM), the surface of the nanocomposite was examined. The Y<sub>2</sub>O<sub>3 </sub>and SrCO<sub>3</sub> nanoparticles were found to be consistently and equally distributed throughout the PVA polymer matrix. Fourier transformation spectroscopy (FTIR) was used to analyses the structural characteristics of the nanocomposite and gather data on molecular vibration. The polymer matrix interacted with the additional Y<sub>2</sub>O<sub>3 </sub>and SrCO<sub>3</sub> nanoparticles, according to FTIR analysis. Physical interactions between Y<sub>2</sub>O<sub>3 </sub>and SrCO<sub>3</sub> nanoparticles and the PVA polymer matrix have been demonstrated by the FTIR analysis. The dielectric constant and loss were found to be significant of (PVA/Y<sub>2</sub>O<sub>3</sub>/SrCO<sub>3</sub>) nanocomposite decrease with increasing of frequency while, they are increase with content ratio of Y<sub>2</sub>O<sub>3</sub> and SrCO<sub>3</sub> NPs. The A.C. conductivity of (PVA/Y<sub>2</sub>O<sub>3</sub>/SrCO<sub>3</sub>) nanocomposite increase with increasing of frequency and concentration of Y<sub>2</sub>O<sub>3</sub> and SrCO<sub>3 </sub>NPs. Finally, the PVA/Y<sub>2</sub>O<sub>3</sub>/SrCO<sub>3</sub> nanocomposites were tested for the antibacterial against both gram positive Staphylococcus aureus (S. aureus) and gram-negative Escherichia coli (E. coli). The result obtained that the inhibition zone diameter increased with increasing Y<sub>2</sub>O<sub>3</sub> and SrCO<sub>3</sub> NPs. The PVA/Y<sub>2</sub>O<sub>3</sub>/SrCO<sub>3</sub> nanocomposite exhibited antibacterial activity. Electrical Characteristic FESEM NPs PVA SrCO3 Y2O3 https://jns.kashanu.ac.ir/article_114502_98c082608bda9da1b0e39437d461e744.pdf