标題：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

來源出版物：JOURNAL OF NANOPARTICLE RESEARCH 卷：15 期：6 文獻編号：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

文獻類型：Article

語種：English

作者關鍵詞：Core-shell-shell, One-pot synthesis, Water-dispersible quantum dots, Microwave synthesis, Good stability

擴展關鍵詞：CORE/SHELL NANOCRYSTALS; MICROWAVE IRRADIATION; IN-VIVO; SEMICONDUCTOR CLUSTERS; CDSE; SIZE; CDTE; PHOTOLUMINESCENCE; PHOTOSTABILITY; CELLS

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

電子郵件地址：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為SPRINGER出版集團旗下關于納米科學與技術的學術期刊，2012年影響因子為2.175（2011年為3.287）。88858cc永利官网圖書館所購買的SPRINGER數據庫提供1999年至今的全文在線閱讀及下載：

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