文献类型：期刊文献

英文题名：Facile synthesis of high-quality CdTe/CdS core/shell quantum dots in aqueous phase by using dual capping ligands

作者：Ma, Yunfei[1];Li, Yan[1];Zhong, Xinhua[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2014

卷号：4

期号：85

起止页码：45473

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20144100084746);WOS:【SCI-EXPANDED(收录号:WOS:000342993500079)】；

基金：We thank the National Natural Science Foundation of China (no. 21175043 and 21301059), Chenguang Program of the Shanghai Education Commission (11CG31), the Science and Technology Commission of Shanghai Municipality (11JC1403100, 12NM0504101), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Cadmium telluride - Reaction kinetics - Semiconductor quantum dots - II-VI semiconductors - Nanocrystals - Efficiency - Chelation

摘要：To overcome the low emission efficiency and poor photo and colloidal stability of quantum dots (QDs) prepared in aqueous media, the main challenge is to find suitable capping reagents to obtain stable QD/ligand complexes. Adenosine 5'-monophosphare (AMP) appears very promising for the stabilization and the further functionalization of QDs because AMP has multiple functionalities that can chelate metal cations. Herein, we synthesized high-quality CdTe/CdS core/shell nanostructures in aqueous media, in which AMP and thiopropionic acid (MPA) acting as dual stabilizing agents were introduced directly on the surface of QDs. With the combination of AMP and MPA ligands, it was found that dual ligands could accelerate the reaction kinetics, accompanied by possessing high emission efficiency of QDs. The prepared water-soluble AMP/MPA-QDs exhibit narrow size distribution and nearly spherical morphology. Most importantly, the resultant water-soluble AMP/MPA-QDs exhibit superior photo and colloidal stability, solving the problem of deterioration for biological applications. To demonstrate the targeting capability of QDs, we have used folate-receptor targeting to show good selectivity to tumor cells.