Gamma radiation effects on optical and electrical conductivity of PVA-PVP-AuNP ternary nanocomposite

Abstract

Pure gold nanoparticles were incorporated in blend of Polyvinyl Alcohol/Polyvinyl Pyrrolidone via one-way laser ablation process. Nanocomposites films of AuNPs@PVA-PVP were formed via casting method. These prepared AuNPs@PVA-PVP films have been irradiatedto different gamma rays doses (3, 5, and 7 Mrad). The influences of gamma rays on the physical characterization of the produced AuNPs@PVA-PVP nanocomposites were studied. Also, the modification in electrical conductivity and dielectric properties were investigated in our work. The structural characterization reveals a distinctive strong peak at 2θ = 38° attributable to the plane (111) associated with the existence of gold nanoparticles, which was reduced by increased gamma ray doses. The optical characteristics of AuNPs produce an SPR peak at 534 nm, which is amplified by raising the dose of gamma ray. By raising the gamma ray dose, the values of ε′ and ε" are steadily decreased as frequency increases. The electrical conductivity efficiency of AuNPs@PVA-PVP films subjected to gamma is greatly improved, and they could be advised for further research in electronic and electrical utilizations.