title: Structural and optical study of mixed structure of ZnO(hexagonal)/ZnS(cubic) nanocomposites.
abstract: ZnO, ZnS and ZnO/ZnS nanocomposites were successfully synthesized by chemical method in an air atmosphere. Water-ethanol matrix was used as solvent. The as-obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible (UV-vis) and photoluminescence (PL) spectrophotometer. The results showed that the ZnS nanoparticles are cubic in structure with the size of about 5 nm growed on the surface of the hexagonal ZnO nanocomposites. The optical study of ZnO/ZnS nanocomposites showed an enhanced PL emission in visible region. The photoluminescence property of the ZnO/ZnS core/shell nanocomposites is varied with respect to the shell thicknesses. PL quenching is observed by increasing of shell thickness on ZnO.
authors.affiliation: Department of Physics, Annamalai University, Annamalai nagar 608 002, Tamilnadu, India. murugadoss_g@yahoo.com
authors.forename: G
authors.initials: G
authors.lastname: Murugadoss
authors.forename: V
authors.initials: V
authors.lastname: Ramasamy
mesh_terms: D008163:Luminescent Measurements; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D013053:Spectrophotometry; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D013440:Sulfides; D017967:Zinc Compounds; C031238:zinc sulfide; D015034:Zinc Oxide