作者：Xiaobo Nie, Jie Cui, Wei Jiang
关键字：半导体纳米棒, 圆柱形胶束, 溶剂蒸发驱动自组装, 嵌段共聚物, 硫化镉
论文来源：期刊
具体来源：Soft Matter, 2014, 10(40), 8051-8059
发表时间：2014年

摘要：通过溶剂蒸发驱动的自组装，将PS修饰的硫化镉纳米棒（PS-CdS NRs）高效嵌入PS-b-PEO超长圆柱形胶束中，并以CTAB作为氯仿-水乳液中的表面活性剂。提高CdS NRs与PS-b-PEO中PS嵌段之间的焓相容性是实现协同组装的前提。研究了水相CTAB浓度、CdS NRs质量分数、有机溶剂与水的体积比以及磁力搅拌速率等因素对协同组装行为的影响，并从表面活性剂和嵌段共聚物在油水界面的吸附角度解释了不同[CTAB]下杂化组装体形貌的差异。CdS NRs在圆柱胶束中的定位极为精确，95.2%的NRs分布于圆柱中心约4 vol%的区域，全部NRs分散于中心约38%的径向范围；杂化圆柱胶束长度可达数十微米，可降低CdS NRs毒性并改善生物相容性，在荧光探针和标记等方面具有应用潜力。

Abstract：The efficient incorporation of PS-tethered cadmium sulfide nanorods (PS-CdS NRs) into polystyrene-block-poly(ethylene oxide) (PS-b-PEO) ultralong cylindrical micelles by solvent evaporation-driven self-assembly is demonstrated. Hexadecyl trimethyl ammonium bromide (CTAB) was used as the surfactant in chloroform-in-water emulsions. The effects of CTAB concentration, the weight fraction of CdS NRs, the volume ratio of the organic solvent to water and the magnetic stirring rate on the cooperative assembly behaviors were investigated. This work presents an extremely precise location of the CdS NRs in the centers of the cylindrical micelles: 95.2% of the CdS NRs were distributed in the central ca. 4 vol% regions of the cylinders and all of them were dispersed in the central ca. 38% radial spans. The length of the hybrid cylindrical micelles can reach tens of micrometers. The ultralong cylindrical micelles functionalized by the CdS NRs in the central cores can lower the toxicity of the CdS NRs and improve the biocompatibility, with potential applications in fluorescence probes, labels and many others.

论文链接：https://doi.org/10.1039/c4sm01353k