Effect of Nature of Surfactant on the Formation of beta-Ag2Se Nanoparticles and Optical Properties of beta-Ag2Se and ZnS/beta-Ag2Se Nanocomposite

摘要

Surfactant assisted synthetic route was followed to prepare silver selenide (beta-Ag2Se) nanoparticles. The effect of three different surfactants viz., Triton X100, SDS and CTAB in the formation of silver selenide nanoparticles had been examined. Pure and crystalline beta-Ag2Se nanophase was obtained in the presence of Triton X100 and SDS. However, the presence of CTAB leads to metallic silver formation. Nano Composite of beta-Ag2Se and ZnS was fabricated in the presence of glycine as a molecular linker. The products were characterized by different techniques such as XRD, FT-IR, SEM and TEM. Room temperature photoluminescence spectrum of the ZnS/beta-Ag2Se nanocomposite exhibited two emission peaks at around 286 nm and 392 nm with enhanced intensity (lambda(ex) = 250 nm).