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Journal of Nanomaterials
Volume 2013 (2013), Article ID 351798, 7 pages
http://dx.doi.org/10.1155/2013/351798
Research Article

Effect of Annealing on the ZnS Nanocrystals Prepared by Chemical Precipitation Method

Department of Physics, Annamalai University, Annamalai Nagar, Chidambaram, Tamil Nadu 608 002, India

Received 19 July 2013; Revised 12 October 2013; Accepted 21 October 2013

Academic Editor: Hong Seok Lee

Copyright © 2013 Nadana Shanmugam et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanocrystals of ZnS have been synthesized through simple chemical precipitation method using thiourea as sulphur source. The synthesized products were annealed at different temperatures in the range of 200–800C. The as-synthesized and annealed samples were characterized by X-ray diffraction (XRD), UV-Visible absorption (UV-Vis), and room temperature photoluminescence (PL) measurements. The morphological features of ZnS annealed at 200 and 500C were studied by atomic force microscope (AFM) and transmission electron microscope (TEM) techniques. The phase transformation of ZnS and formation of ZnO were confirmed by thermogravimetric (TG) and differential thermal analysis (DTA) curves.