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Journal of Nanotechnology
Volume 2011, Article ID 916750, 7 pages
Research Article

Effect of Microwave Power on the Physical Properties of Carboxylic Acid-Coated Manganese-Ion-Doped Zinc Sulfide Nanoparticles

1Department of Physics, Ramananda College, Bishnupur, Bankura, West Bengal 722 122, India
2Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan

Received 23 March 2011; Accepted 18 April 2011

Academic Editor: John A. Capobianco

Copyright © 2011 Baibaswata Bhattacharjee and Chung-Hsin Lu. 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.


Bright ZnS : Mn2+ nanoparticles have been synthesized employing microwave irradiation technique and using zinc 2-ethylhexanoate as a novel zinc precursor. A series of samples is obtained by changing the microwave power (from 150 W to 500 W) to study its effect on the physical properties of the ZnS : Mn2+ nanoparticles. The particle size increases with increasing microwave power for the samples synthesized in the microwave range of 150 W to 300 W. The decrease in particle size for higher microwave power (400 W and 500 W) can be described as an onset of the secondary nucleation due to the excess energy associated with the higher microwave power. The sample synthesized with microwave power of 300 W shows highest luminescence intensity suggesting increase in Mn2+ luminescence center for the sample synthesized at 300 W, as supported by the quantity analysis results.