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.
Choi, S. Y., Shim, J. P., Kim, D. S., Kim, T., & Suh, K. S. (2012). Aqueous Synthesis of CdTe Quantum Dot Using Dithiol-Functionalized Ionic Liquid. Journal of Nanomaterials, 2012, 1–6. https://doi.org/10.1155/2012/519458