Gamma radiation synthesis of colloidal silver nanoparticles

Abstract

Radiochemical synthesis of metallic nanoparticles is an eco-friendly method allowing the obtaining of controlled size, well dispersed and highly stable particles at very mild conditions. Colloidal silver nanoparticles were synthesized in a one-step process, in an aqueous system consisting of polyvinyl alcohol (PVA)/Ag+/ isopropyl alcohol (IPA), irradiated at various doses by using high energy ionizing radiations (γ-rays). The UV-Vis spectra have shown a maximum absorption peak in the range of 390-450 nm, specific for silver nanoparticles. The size of the obtained spherical shape nanoparticles was below 50 nm and decreased with increasing of the irradiation dose.