胶束
共聚物
融合
结晶
液晶
自组装
化学工程
化学物理
化学
材料科学
结晶学
块(置换群论)
纳米技术
有机化学
聚合物
水溶液
哲学
工程类
光电子学
语言学
数学
几何学
作者
Gengchiau Liang,Hongbing Gao,Jiaping Lin,Liquan Wang,Xiaosong Wang,Chunming Yang,Shaoliang Lin
出处
期刊:Macromolecules
[American Chemical Society]
日期:2020-10-08
卷期号:53 (20): 8992-8999
被引量:27
标识
DOI:10.1021/acs.macromol.0c01820
摘要
Growth and termination of cylindrical micelles with cholesteric liquid crystal (LC) cores (seeds) were achieved experimentally, following the simulation studies of liquid-crystallization-driven self-assembly (LCDSA) of block copolymers. The fluidity of LC cores was proven to be crucial for this success. To a seed solution, the added block copolymer unimers had a high tendency to form new aggregates. The formed aggregates had a less-ordered cholesteric LC structure as compared with those in the seed and subsequently fused with the seeds. After the fusion, the fluidity allowed a rearrangement of the rod blocks within the elongated segments to match the LC structure in the seeds. The fusion and rearrangement were repeated in cycles, which completely consumed the newly formed aggregates and led to a seeded-growth behavior. Under a condition that the interactions between LC blocks are stronger, the newly formed aggregates had smectic LC cores, which fused with the seeds terminating the growth. The termination is attributed to the higher energy barrier for the transition from the smectic LC structure to cholesteric active ends. This work created a theoretical basis for further exploration of living assembly using LC block copolymers, which are building blocks for a wide range of functional materials.
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