Pathway toward Large Two-Dimensional Hexagonally Patterned Colloidal Nanosheets in Solution

被引：74

作者：

Ni, Bo ^{[1
]}

Huang, Mingjun ^{[1
]}

Chen, Ziran ^{[1
]}

Chen, Yingchao ^{[3
]}

Hsu, Chih-Hao ^{[1
]}

Li, Yiwen ^{[1
]}

Pochan, Darrin ^{[3
]}

Zhang, Wen-Bin ^{[1
,2
]}

Cheng, Stephen Z. D. ^{[1
]}

Dong, Xue-Hui ^{[1
]}

机构：

[1] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA

[2] Peking Univ, Coll Chem & Mol Engn, Ctr Soft Matter Sci & Engn, Key Lab Polymer Chem & Phys,Minist Educ, Beijing 100871, Peoples R China

[3] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 04期

基金：

美国国家科学基金会;

关键词：

BLOCK-COPOLYMERS; MOLECULAR NANOPARTICLES; DIBLOCK COPOLYMERS; SHAPE AMPHIPHILES; MICELLES; SURFACTANTS; ASSEMBLIES; MORPHOLOGIES; VESICLES; ORIGINS;

D O I：

10.1021/ja511694a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the solution self-assembly of an ABC block terpolymer consisting of a polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer tail tethered to a fluorinated polyhedral oligomeric silsesquioxane (FPOSS) cage in 1,4-dioxane/water. With increasing water content, abundant unconventional morphologies, including circular cylinders, two-dimensional hexagonally patterned colloidal nanosheets, and laterally patterned vesicles, are sequentially observed. The formation of toroids is dominated by two competing free energies: the end-cap energy of cylinders and the bending energy to form the circular structures. Incorporating the superhydrophobic FPOSS cages enhances the end-cap energy and promotes toroid formation. Lateral aggregation and fusion of the cylinders results in primitive nanosheets that are stabilized by the thicker rims to partially release the rim-cap energy. Rearrangement of the parallel-aligned FPOSS cylindrical cores generates hexagonally patterned nanosheets. Further increasing the water content induces the formation of vesicles with nanopatterned walls.

引用

页码：1392 / 1395

页数：4

共 37 条

[1] Vesicles and liposomes:: A self-assembly principle beyond lipids [J].