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Journal of Nanomaterials
Volume 2012, Article ID 519458, 6 pages
http://dx.doi.org/10.1155/2012/519458
Research Article

Aqueous Synthesis of CdTe Quantum Dot Using Dithiol-Functionalized Ionic Liquid

1Department of Materials Science and Engineering, Korea University, 5-1 Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea
2Electronic Materials and Device Research Center, Korea Electronics Technology Institute, Gyeonggi-do 463-816, Republic of Korea

Received 6 August 2011; Accepted 28 October 2011

Academic Editor: Somchai Thongtem

Copyright © 2012 Suk Young Choi 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

We report on an aqueous synthesis of cadmium telluride (CdTe) nanocrystals by using dithiol-functionalized ionic liquids (dTFILs). The dTFILs were designed to have dithiol and vinylimidazolium functional groups and used as a ligand molecule of CdTe quantum dot (QD) to utilize the bidendate chelate interaction afforded by the dithiol groups of dTFILs. The photoluminescence quantum yield of dTFIL-capped CdTe QDs reached up to ~40%, and their luminescent property was maintained for 8 weeks, suggesting an improved stability in water phase. This approach will provide a new synthetic route to the water soluble QDs.