Preparation of Germanium-Tin Alloy Nanoparticles by Laser-Assisted Techniques in Liquid

Abstract

Laser-assisted synthesis of germanium–tin (Ge–Sn) alloy nanoparticles (NPs) using 532-nm laser processing of colloidal solutions produced by laser ablation of Ge in Sn suspension has been demonstrated and studied. Laser-induced rapid heating, subsequent co-melting and re-solidification processes at high cooling rates have been considered to be experimentally achieved at the optimized laser processing parameters. Detailed characterization of the formed Ge–Sn alloys indicated substitution of Sn atoms in the Ge matrix.