In a systematic investigation has been found that ligands play an important role in both the water-phase preparation and optical properties of CdTe quantum dots. Experiments were performed using three typical thioalkyl acids as ligands, namely mercaptoacetic acid (MAA), l-cysteine (Cys) and reduced glutathione (GSH). The growth rate and size-distribution of CdTe quantum dots (QDs) are shown to depend on the type of ligands. A proper choice of ligand enables to make lager nanocrystals with narrower size-distribution. The effects of pH (buffer solution), illumination, heating and cations on the spectroscopic properties of CdTe QDs for the three ligands are reported. In addition, three same-size CdTe QDs were individually characterized by micellar electrokinetic capillary electrophoresis with laser-induced fluorescent detection, which proved their monodisperse size-distribution and different electric charge distribution on the surface for each of the three different type of QDs. © 2009.
CITATION STYLE
Zhang, Y. hai, Zhang, H. shan, Ma, M., Guo, X. feng, & Wang, H. (2009). The influence of ligands on the preparation and optical properties of water-soluble CdTe quantum dots. Applied Surface Science, 255(9), 4747–4753. https://doi.org/10.1016/j.apsusc.2008.09.009
Mendeley helps you to discover research relevant for your work.