Selenium nanoparticles were obtained by a new facile synthetic route from gelatin-stabilized
aqueous colloidal solutions. The dependence of structural and optical properties of the
nanoparticles upon duration of post-synthesis thermal treatment of Se sols was studied by
optical absorption, photoluminescence and Raman scattering. We have shown that ageing
of colloidal Se solutions at elevated temperatures results in an enlargement and
crystallization of selenium nanoparticles, accompanied with noticeable changes in their …