Effect of the structure of a network matrix on the formation of gold nanoparticles during photoreduction of its salts in solutions of acrylic oligomers

Abstract

The effect of network parameters of three-dimensionally crosslinked polyacrylic optically transparent matrices on the generation of surface plasmon resonance of gold nanoparticles forming during irradiation of Au3+ salt solutions in a liquid acrylic composite is studied. During the UV irradiation of a solution, the photoreduction of gold and the photoinitiated polymerization of acrylates proceed simultaneously to form transparent colorless films in which, after subsequent light and/or heat treatment, an absorption band near 550 nm that corresponds to the plasmon resonance of nanosize metal particles is generated. During the photoreduction of gold salt in matrices of oligo(urethane acrylate) composites with similar structures of the oligomeric block, the parameters of the three-dimensional network—the internodal and interchain distances—affect the rate of generation of gold nanoparticles but not the limiting value of optical density for the plasmon-resonance band of nanoparticles. Polyacrylate matrices may serve as a registering medium for optical data recording.