Encapsulation of semiconductor quantum dots into the central cores of block copolymer cylindrical and toroidal micelles

被引:10
作者
Nie, Xiaobo [1 ,2 ]
Xu, Jiangping [1 ,2 ]
Cui, Jie [1 ]
Yang, Bai [3 ]
Jiang, Wei [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China
来源
RSC ADVANCES | 2013年 / 3卷 / 46期
基金
中国国家自然科学基金;
关键词
GOLD NANOPARTICLES; MULTIPLE MORPHOLOGIES; INTERFACIAL INSTABILITIES; SHELL NANOCRYSTALS; DIBLOCK COPOLYMERS; CDSE/CDS CORE; TRANSITION; ORGANIZATION; TEMPLATES; PARTICLES;
D O I
10.1039/c3ra44403a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The formation of well-defined nanoparticles-loaded cylindrical micelles is of considerable interest to the development of nanomaterials with desired optical, electric, magnetic, and mechanical properties. Herein, encapsulation of monodisperse polystyrene (PS)-grafted CdSe/CdS quantum dots (QDs) within the PS cores of PS-b-PEO cylindrical and toroidal micelles proceeded through dispersion of both the QDs and PS-b-PEO in a good solvent (DMF) then simultaneous desolvation of QDs and PS block of the copolymer by addition of water. We demonstrated the effects of water content and stirring time on the morphologies of hybrid assemblies and found that the cylindrical and toroidal micelles with QDs uniformly encapsulated into the central cores were preferentially formed at the block copolymer initial concentration of 2 wt%, water content of 6 wt% and stirring time of 5-7 days. Additionally, two different formation pathways of the hybrid cylindrical micelles were demonstrated. Moreover, the colloidal aqueous solution of hybrid assemblies exhibit highly emissive properties as compared to the unmodified QDs, which have potential application in biological targeting and fluorescence labeling.
引用
收藏
页码:24625 / 24633
页数:9
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