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Journal of Nanomaterials
Volume 2015, Article ID 109734, 11 pages
http://dx.doi.org/10.1155/2015/109734
Research Article

Synthesis of Co-Doped CdS Nanocrystals by Direct Thermolysis of Cadmium and Cobalt Thiolate Clusters

School of Material Science and Engineering, Northeast Forestry University, No. 26 Hexing Road, Harbin 150040, China

Received 29 March 2015; Revised 5 June 2015; Accepted 7 June 2015

Academic Editor: Ruibing Wang

Copyright © 2015 Jianing Zhao 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

Co-doped CdS (Co:CdS) nanocrystals with controllable morphology (quantum dots and nanorods) were easily synthesized by direct thermolysis of (Me4N)2[Co4(SC6H5)10] and (Me4N)4[S4Cd10(SPh)16] under different precursor concentration, in virtue of the ions exchange of molecular clusters. The Co:CdS quantum dots were produced under low precursor concentration, and the Co:CdS nanorods could be obtained under higher precursor concentration. The Co-doping effect on the structure, growth process, and property of CdS nanocrystals was also investigated. The results indicated that the Co-doping was favorable for the formation of the nanorod structures for a short reaction time. In addition, the Co-doping in the CdS lattice resulted in the ferromagnetic property of the Co:CdS quantum dots at room temperature. Moreover, compared with the CdS quantum dots, the Co:CdS quantum dots exhibited obvious quantum confinement effect and photoluminescence emission with slightly red-shift.