Abstract
Submicronsized ZnS particles have been prepared by reacting zinc chloride and thiourea in the pH range 8-12. The smallest particles (10-20 nm) have been obtained with the use of sodium hydroxide. Increasing the pH of the solution and the thiourea concentration has been shown to increase the particle size. In the diffuse reflection spectra of the ZnS powders obtained using NaOH, the fundamental absorption edge is shifted by 20 to 30 nm.
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