A gamma-ray irradiation reduction route to prepare rod-like Ag 2S nanocrystallines at room temperature

Abstract

Rod-like Ag 2S nanocrystallines have successfully been synthesized by using Na 2S 2O 3 as a chalcogen source in an aqueous solution via gamma-ray irradiation at room temperature. The lattice constants of 0.41 nm, 0.68 nm, and 0.77 nm for the monoclinic Ag 2S phase were obtained from X-ray powder diffraction pattern. The nanorods have nonuniform diameters in the range of 200 to 500 nm and lengths of up to several ten micrometers. The band gap of Ag 2S nanorods calculated from the UV–Vis spectrum is 2.34 eV, showing an obvious blue shift in UV–Vis absorption.