Preparation and characterization of ZnSe/CdSe core-shell microspheres

The preparation of ZnSe/CdSe core-shell structure nanocomposites by using the re-prepared ZnSe microspheres as the template under the hydrothermal condition was presented. The influence of different mole ratios of ZnSe to Cd(NO3)2 on the morphology and structure of the final product was investigated. And the performances of ZnSe/CdSe core-shell structure nanocomposites were characterized by the means of X-ray diffraction (XRD) analyses, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy. The results indicate that the core-shell structure product can be prepared, when the mole ratio of ZnSe to Cd(NO3)2 is larger than 1:1; and the product will be ball solid structure, when the mole ratio of ZnSe to Cd(NO3)2 is equal to 1:1. The photo luminescence results show that ZnSe/CdSe core-shell structures have high photo luminescence emission properties, and the product with mole ratio of ZnSe to Cd(NO3)2 being 1:0.5 has the best luminescence properties.