Synthesis and Characterization of Transition Metal ion Doped ZnS and ZnO Nanostructures

摘要

Nanocrystalline films and powders of semiconducting ZnS, with and without doping with Cr, Co and Ni ions, have been synthesized using a low-temperature chemical bath deposition approach in aqueous solution. X-ray diffraction analyses evidenced that ZnS structures consisted of cubic or a mixture of a cubic/hexagonal phase. Average crystallite size was estimated to be 3–4 nm using Scherrer's equation. ZnS and transition metal-doped ZnS were thermally oxidized into corresponding oxides. Magnetic and optical behavior of the sulfide films and powders were investigated using SQUID and UV-visible spectrometry, respectively. Preliminary magnetic measurements suggest antiferromagnetic ordering in Zn_(0.9)Cr_(0.1)S.