Preparation and characterization of the ZnS nanospheres with narrow size distribution

In this work, we report the synthesis of ZnS nanospheres with relatively narrow size distribution using polyvinyl pyrrolidone (PVP) as a capping reagent. The nanocrystallite powers were characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), electron diffraction (ED), and UV–vis optical absorption spectra. The synthesized nanocrystallite show typical lattice spacings corresponding to the cubic phase of ZnS, as confirmed from HRTEM, ED, and XRD. The UV–vis spectra shows a blue shift of the first excitonic transition band compared with bulk ZnS, probably due to the quantum size effect.