title: Microwave-assisted synthesis of water-dispersed CdTe/CdSe core/shell type II quantum dots.
abstract: A facile synthesis of mercaptanacid-capped CdTe/CdSe (core/shell) type II quantum dots in aqueous solution by means of a microwave-assisted approach is reported. The results of X-ray diffraction and high-resolution transmission electron microscopy revealed that the as-prepared CdTe/CdSe quantum dots had a core/shell structure with high crystallinity. The core/shell quantum dots exhibit tunable fluorescence emissions by controlling the thickness of the CdSe shell. The photoluminescent properties were dramatically improved through UV-illuminated treatment, and the time-resolved fluorescence spectra showed that there is a gradual increase of decay lifetime with the thickness of CdSe shell.
authors.affiliation: School of Material Science and Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200240, People's Republic of China. xykong@sjtu.edu.cn.
authors.forename: Li-Man
authors.initials: LM
authors.lastname: Sai
authors.forename: Xiang Yang
authors.initials: XY
authors.lastname: Kong