作者：Xiaobo Nie, Jiangping Xu, Jie Cui, Bai Yang, Wei Jiang
关键字：量子点, 嵌段共聚物, 圆柱形胶束, 环形胶束, 封装, 自组装
论文来源：期刊
具体来源：RSC Advances, 2013, 3(46), 24625-24633
发表时间：2013年

通过将单分散的聚苯乙烯（PS）接枝CdSe/CdS量子点（QDs）与PS-b-PEO在良溶剂DMF中分散，再加入水使QDs和PS嵌段同时脱溶剂，实现了QDs在PS-b-PEO圆柱形和环形胶束PS核内的封装。研究发现，在嵌段共聚物初始浓度2 wt%、水含量6 wt%、搅拌时间5-7天时，QDs均匀封装于中心核的圆柱形和环形胶束优先形成；还证实了杂化圆柱形胶束的两种不同形成路径。与未改性QDs相比，杂化组装体的胶体水溶液具有高发光性能，在生物靶向和荧光标记方面具有应用潜力。

Encapsulation of monodisperse polystyrene-grafted CdSe/CdS quantum dots 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) followed by simultaneous desolvation of the QDs and PS block upon addition of water. Cylindrical and toroidal micelles with QDs uniformly encapsulated into the central cores were preferentially formed at an initial block copolymer concentration of 2 wt%, water content of 6 wt% and stirring time of 5-7 days. Two different formation pathways of the hybrid cylindrical micelles were demonstrated. The colloidal aqueous solution of the hybrid assemblies exhibited highly emissive properties compared with the unmodified QDs, showing potential application in biological targeting and fluorescence labeling.

论文链接：https://doi.org/10.1039/c3ra44403a