Abstract
This paper reports the effect of Ni layer thickness on the optical properties of the PVA/Ni nanocomposite films prepared by embedding Ni nanoparticles into the PVA (polyvinyl alcohol) film matrix using ion beam sputtering technique. UV–Vis-NIR spectra have been used to determine the optical parameters like absorption bands, absorption edge, transmission, bandgap, refractive index (RI), extinction coefficient and optical conductivity. As observed, all the above optical parameters were found to have changed remarkably on incorporation of Ni nanoparticles in the PVA film; for example, indirect band gap reduced from 5.01 to 4.38 eV, and RI increased from 1.21 to 10.04.
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