title: Synthesis of highly luminescent Mn:ZnSe/ZnS nanocrystals in aqueous media.
abstract: High-quality water-dispersible Mn(2+)-doped ZnSe core/ZnS shell (Mn:ZnSe/ZnS) nanocrystals have been synthesized directly in aqueous media. Overcoating a high bandgap ZnS shell around the Mn:ZnSe cores can bring forward an efficient energy transfer from the ZnSe host nanocrystals to the dopant Mn. The quantum yields of the dopant Mn photoluminescence in the as-prepared water-soluble Mn:ZnSe/ZnS core/shell nanocrystals can be up to 35 +/- 5%. The optical features and structure of the obtained Mn:ZnSe/ZnS core/shell nanocrystals have been characterized by UV-vis, PL spectroscopy, TEM, XRD and ICP elementary analysis. The influences of various experimental variables, including the Mn concentration, the Se/Zn molar ratio as well as the kind and amount of capping ligand used in the core production and shell deposition process, on the luminescent properties of the obtained Mn:ZnSe/ZnS nanocrystals have been systematically investigated.
authors.affiliation: Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai, People's Republic of China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Fang
authors.forename: Ping
authors.initials: P
authors.lastname: Wu
authors.forename: Xinhua
authors.initials: X
authors.lastname: Zhong
authors.forename: Yong-Ji
authors.initials: YJ
authors.lastname: Yang