A new preparation of zinc sulfide nanoparticles by solid-state method at low temperature

A novel solid-state method of the preparation of zinc sulfide nanoparticles is reported. By solid-state reaction of zinc acetate and thioacetamide at low temperature, zinc sulfide nanoparticles of different sizes were prepare d. The temperature of preparation varied from room temperature to 300 degre es C. The particles were characterized by X-ray diffraction (XRD), transmis sion electron microscopy (TEM), differential thermal analysis (DTA), and ph otoluminescence spectrum. X-ray diffraction patterns revealed that the part icles exhibited pure zinc-blende crystal structure and that particle size i ncreased with increasing temperature. The TEM micrograph showed that the me an particle size was about 40 nm for the sample heated at 100 degrees C. A blue shift was observed in the photoluminescence emission spectrum. A possi ble mechanism of the reaction corresponding to our observation is proposed, (C) 2000 Elsevier Science Ltd. All rights reserved.