Controlled organization of self-assembled rod-coil block copolymer micelles

被引：18
|
作者：
Tu, Yingfeng [1 ,2 ,3 ]
Graham, Matthew J. [2 ,3 ]
Van Horn, Ryan M. [2 ,3 ]
Chen, Erqian [1 ]
Fan, Xinhe [1 ]
Chen, Xiaofang [1 ]
Zhou, Qifeng [1 ]
Wan, Xinhua [1 ]
Harris, Frank W. [2 ,3 ]
Cheng, Stephen Z. D. [2 ,3 ]
机构：
[1] Peking Univ, Coll Chem & Mol Engn, Dept Polymer Sci & Engn, Beijing 100871, Peoples R China
[2] Univ Akron, Maurice Morton Inst, Akron, OH 44325 USA
[3] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA
来源：
POLYMER | 2009年 / 50卷 / 22期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Rod-coil block copolymers; Self-assembly; Micelles; THIN-FILMS; DIBLOCK-COPOLYMER; COLLOIDAL CRYSTALS; PHOTONIC CRYSTALS; MONOLAYER FILMS; LIQUID-CRYSTAL; SPHERES; NANOPARTICLES; MORPHOLOGIES; POLYSTYRENE;
D O I：
10.1016/j.polymer.2009.09.006
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Spherical micelles of a series of poly(styrene-block-(2,5-bis[4-methoxyphenyl]oxycarbonyl)styrene) (PS-b-PMPCS) rod-coil diblock copolymers in a selective solvent can organize into large mono-layered films with a well-ordered hexagonal packing of the spheres after solvent evaporation. Organized domains in the spherical micelle film were observed by transmission electron microscopy (TEM) and atomic force microscopy (AFM). The core-shell structure of the spherical micelle remained after solvent evaporation. The micelle diameter in the ordered film as observed by TEM and AFM agree. The size of the spherical micelles can be controlled by the length of PMPCS when the length of the PS is fixed. The sphere diameters were varied from several tens of nanometers to more than one hundred nanometers. Solutions of smaller micelle spheres formed less ordered films than those from larger micelle particles. Additionally, monolayer films of cylindrical worm-like micelles were also prepared. Those cylindrical micelles were observed to be end-capped by spherical micelles. The monolayer micelle film from the largest spherical micelles appeared red when observed in optical microscopy in the reflection mode. A broad adsorption peak with a maximum adsorption wavelength of 545 nm was observed via UV-Vis spectroscopy. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5170 / 5174
页数：5
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