Effect of green synthesis bimetallic Ag@SiO2 core–shell nanoparticles on absorption behavior and electrical properties of PVA-PEO nanocomposites for optoelectronic applications

A green and easy technique was used to synthesize silver silica (Ag@SiO2) core–shell nanoparticles (NPs) in the matrix blend polymers matrix. Core–shell were loaded into polyvinyl alcohol (PVA) ultrahigh molecular weight polyethylene oxide (UHMW-PEO) blended polymer fabricate new nanocomposite films (NCFs) using developed solution-sonication-casting technique. The spectroscopic properties of resultant investigated x-ray diffraction (XRD), Fourier transforms infrared (FTIR), visible light microscope (OLM), field emission scanning electron (FESEM), FESEM-energy dispersive spectroscope (FESM-EDX), UV/visible spectrometer, LCR meter investigate structural, morphological, optical, electrical characteristics. XRD revealed presence semi-crystalline nature PVA-UHMWPEO/ Ag@SiO2 NCFs. degree crystallinity increased after embedding. NPs well distributed within NCFs according OLM SEM, FESM-EDX confirmed C, O, Si, Ag elements. FTIR spectrum observed strong bonding loading NPs, other peaks hidden. spectrums suggested an absorption at ~ 210 nm. Based on Tauc plot model, optical bandgap (Eg) values decreased from 5.52 eV 4.57 eV. conductivity significantly with increasing frequency ratio. PVA-UHMWPEO/Ag@SiO2 explained enhanced lattice strain. obtained are suitable for use various optoelectronic nanodevice applications.