Synthesis of CuInSe_2 monodisperse nanoparticles and the nanorings shape evolution via a green solution reaction route

摘要

High-quality CuInSe_2 nanoparticles were successfully synthesized through a green, simple, low-cost route using environmentally friendly N-oleoylmorpholine as a new solvent of Se powder and oleylamine as capping ligand. The as-synthesized nanoparticles were characterized by X-ray diffraction, TEM, HRTEM, and energy dispersive X-ray spectroscopy. The experimental results revealed that the as-prepared CuInSe_2 nanoparticles with chalcopyrite tetragonal structure have an average size about 8 nm. The facile and green synthesis strategy was also used to synthesize hexagonal shaped CuInSe_2 nanorings by altering the synthesis parameters. Possible shape evolution and crystals growth mechanisms have been suggested for the formation of spherical shaped CuInSe_2 nanoparticles and hexagonal shaped CuInSe_2 nanorings, respectively.