%0 Journal Article
%T One-Pot Synthesis of Biocompatible CdSe/CdS Quantum Dots and Their Applications as Fluorescent Biological Labels
%A Zhai Chuanxin
%A Zhang Hui
%A Du Ning
%A Chen Bingdi
%J Nanoscale Research Letters
%D 2011
%I Springer
%X We developed a novel one-pot polyol approach for the synthesis of biocompatible CdSe quantum dots (QDs) using poly(acrylic acid) (PAA) as a capping ligand at 240ˇăC. The morphological and structural characterization confirmed the formation of biocompatible and monodisperse CdSe QDs with several nanometers in size. The encapsulation of CdS thin layers on the surface of CdSe QDs (CdSe/CdS core¨Cshell QDs) was used for passivating the defect emission (650 nm) and enhancing the fluorescent quantum yields up to 30% of band-to-band emission (530¨C600 nm). Moreover, the PL emission peak of CdSe/CdS core¨Cshell QDs could be tuned from 530 to 600 nm by the size of CdSe core. The as-prepared CdSe/CdS core¨Cshell QDs with small size, well water solubility, good monodispersity, and bright PL emission showed high performance as fluorescent cell labels in vitro. The viability of QDs-labeled 293T cells was evaluated using a 3-(4,5-dimethylthiazol)-2-diphenyltertrazolium bromide (MTT) assay. The results showed the satisfactory (>80%) biocompatibility of as-synthesized PAA-capped QDs at the Cd concentration of 15 ¦Ěg/ml.
%K Polyol Synthesis
%K CdSe/CdS
%K Quantum dots
%K Nanomaterials
%K Luminescence
%K Labeling
%U http://www.nanoscalereslett.com/content/6/1/31