Formation of Silver Colloids by Photostimulated Reduction

Abstract

In this work the effectiveness of electromagnetic radiation for the formation of spherical silver nanoparticles in water solution is studied. Silver nanoparticles colloid was synthesized by photostimulated reduction of Ag ions in silver salt aqueous solution stabilized by sodium citrate. The formation of silver nanoparticles in test solution was confirmed by spectrophotometry. The elemental composition of the silver colloid obtained by photoreduction technique was defined. The size and shape of the formed nanoparticles was determined by transmission electron microscope (TEM). Besides, the theoretical modeling of spectral characteristics were carried out by dipole equivalence method and discrete dipole approximation (DDA). It is shown that electromagnetic irradiation is promising approach for the formation of spherical silver nanoparticles in solution.