Novel Hybrid SiO2/ZnS Coated CdTe/CdS Quantum Dots and Their Bioapplications

被引：0
|
作者：
刘琳 [1 ]
丁兆强 [1 ]
杨慧琴 [1 ]
权静 [1 ]
朱利民 [1 ]
聂华丽 [1 ,2 ]
机构：
[1] College of Chemistry,Chemical Engineering and Biotechnology,Donghua University
[2] State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University
来源：
Journal of Donghua University(English Edition) | 2017年 / 34卷 / 01期
基金：
中央高校基本科研业务费专项资金资助;
关键词：
quantum dots(QDs); CdTe/CdS nanocrystals; hybrid nanostructures; optical probes; bio-imaging;
D O I：
10.19884/j.1672-5220.2017.01.024
中图分类号：
TB383.1 []; O657.3 [光化学分析法（光谱分析法）];
学科分类号：
070205 ; 070302 ; 080501 ; 081704 ; 1406 ;
摘要：
Novel CdTe/CdS quantum dots(QDs)coated with a hybrid of SiOand ZnS were fabricated through a simple two-step approach.The hybrid SiO/ZnS coated CdTe/CdS quantum dots was characterized by transmission electron microscopy(TEM),UV and fluorescence spectrometer.Results indicated that the core-shell structure gave the QDs outstanding photoluminescence properties,includinganarrowphotoluminescencespectrum,high photoluminescence(PL)quantum yield and long emission lifetime(average PL lifetime of increased from 26.4 ns to 49.1 ns).Cellular studies showed the QDs had good cytocompatibility with Hela cells as determined by the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide(MTT)assay after coating SiO/ZnS,and also proved the feasibility of using the hybrid SiO/ZnS coated QDs as optical probes for in vitro cell imaging.The synthesis method of QDs is highly promising for the production of robust and functional optical probes for bio-imaging and sensing applications.
引用
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页码：131 / 136
页数：6
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