Structure and Optical Characteristics of PVA Films Doped with Silver Nanoparticles

Abstract

Tests are conducted to ascertain the impact that the introduction of silver nanoparticles in the PVA matrix has on composite films. The samples are made up of extremely thin PVA films that have been infused with silver nanoparticles of various densities and concentrations. X-ray diffraction and the FTIR spectrum are used to examine the properties of structures. Sample reflectance and transmittance measurements are used to determine and explain the effect of doping concentration & nanoparticle doping on optical characteristics of PVA films. These features include, but are not limited to, the absorptivity, optical band gap of energy energies, difficult refractive index, complicated dielectric functions, optical imaging conductivity, and the relaxation time. Film refractive index change is examined and quantified using the Wemple- DiDomenico (WD) single oscillator model. The results show that when silver nanoparticles are incorporated into PVA, the amount of Bragg's planes in the polymer's structure increases, making the material considerably more crystalline. Bandgap energy was reduced due to the development of Ag-O bonds in the films. WD model calculations show that nanoparticles weaken PVA's anion strength as a dielectric medium.