标题：One-pot aqueous-phase synthesis of ultra-small CdSe/CdS/CdZnS core-shell-shell quantum dots with high-luminescent efficiency and good stability作者：Zhan, Hongju; Zhou, Peijiang; Pan, Keliang; He, Ting; He, Xuan; Zhou,Chuanyun; He, Yuning

来源出版物：JOURNAL OF NANOPARTICLE RESEARCH 卷：15 期：6 文献编号：1680 DOI：10.1007/s11051-013-1680-8出版年：JUN 2013

摘要：We describe the preparation and structural characterization of ultra-small water-dispersible CdSe semiconductor nanocrystal quantum dots (QDs), which are covered by a double-shell structure from CdS and CdZnS through a one-pot microwave-assisted synthesis technique. Because of the radial increase of the respective valence-and conduction-band offsets, the resulting core-shell-shell CdSe/CdS/CdZnS QDs are well electronically passivated, which endows them with high-fluorescence quantum yield of 90 % and high crystallinity, as was investigated by optical characterization, X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. Also, due to the stepwise adjustment of the lattice parameters in the radial direction, the obtained QDs display remarkable photostability, acid stability, and oxidation stability both in the aqueous solutions and the intracellular environment. The cytotoxicity experiment further substantiates the good biocompatibility of the core-shell-shell particles, though the size of the obtained QDs was very small (about 3.2 nm). This implied that the CdSe/CdS/CdZnS core-shell-shell QDs can be used as a promising candidate for fluorescent QDs-based biological applications.

入藏号：WOS:000319516400014

文献类型：Article

语种：English

作者关键词：Core-shell-shell, One-pot synthesis, Water-dispersible quantum dots, Microwave synthesis, Good stability

扩展关键词：CORE/SHELL NANOCRYSTALS; MICROWAVE IRRADIATION; IN-VIVO; SEMICONDUCTOR CLUSTERS; CDSE; SIZE; CDTE; PHOTOLUMINESCENCE; PHOTOSTABILITY; CELLS

通讯作者地址：Zhou, Peijiang; Wuhan Univ, Sch Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China

电子邮件地址：2010102050026@whu.edu.cn; zhoupj@whu.edu.cn

地址：

[Zhan, Hongju; Zhou, Peijiang; Pan, Keliang; He, Ting; He, Xuan; Zhou, Chuanyun; He, Yuning] Wuhan Univ, Sch Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

[Zhan, Hongju] Jingchu Univ Technol, Jingmen 448000, Peoples R China.

研究方向：Chemistry; Science & Technology - Other Topics; Materials Science

ISSN：1388-0764

注：Journal of Nanoparticle Research为SPRINGER出版集团旗下关于纳米科学与技术的学术期刊，2012年影响因子为2.175（2011年为3.287）。武汉大学图书馆所购买的SPRINGER数据库提供1999年至今的全文在线阅读及下载：

http://www.springer.com/materials/nanotechnology/journal/11051