Solvothermal synthesis and optical properties of single-crystal ZnS nanorods

Pure and uniform hexagonal-phase ZnS nanorods with quantum confinement effect were synthesized by solvothermal method. The as-prepared product had been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX) and high-resolution transmission electron microscopy (HRTEM). Photoluminescence spectrum (PL) and UV-vis absorption spectrum were used to investigate the optical properties of ZnS nanorods. The strong emission peak centered at 425 nm in PL spectrum could be attributed to the electron-hole recombination from internal vacancies for Zn and S atoms. (C) 2008 Elsevier B.V. All rights reserved.