Growth time dependence of size of nanoparticles of ZnS

Growth time is an important factor in the growth of nanoparticles of a semiconducting material. With this view ZnS is synthesized at different duration of times by chemical method.Nanocrystalline ZnS is synthesized at room temperature by a cost effective chemical reduction method. The dispersed as grown samples in ethanol are characterized using electron diffraction techniques. Simultaneously optical absorption, photoluminescence of these samples is studied at room temperature. The increase of particle sizes and decrease of band gap of the as prepared ZnS nanoparticles are observed with increase in growth time. The size of the nanoparticles depends on growth time. An increase in band gap is observed in each case as compared to bulk ZnS. An attempt is made to correlate the structural, optical properties.