Structural and Optical Properties of polyvinyl alcohol doped silver (PVA:Ag) film

The present paper investigates a detailed study on the optical properties of PVA/Ag nanocomposite films. In this interest, PVA/Ag nanocomposites with different ways of study, the first prepared film by reduction 0.2M of Ag+ ions in 2 gm of PVA and study the transmission absorption coefficient, refractive index, extinction coefficient, reflection, real & imaginary part of the dielectric constant and the energy gap. The results proved that the best values of the absorbency was within the range (350-500) nm, as well as for both we noticed an increase of the refractive index, the extinction coefficient and reflectivity with increasing energy, the second step of research was by using Density Functional Theory (DFT), It was calculate spectrum absorption, intensity and energy gap for the same compound PVA/Ag, The cooperation of polyvinyl alcohol (PVA) nanofibers with silver (Ag) nanoparticles (mean width 8nm) has been displayed utilizing thickness useful hypothesis (DFT) computations. The physical adsorption of PVA through the hydroxyl gathering, to the Ag, were calculated by using DFT theory.