Understanding the ordering mechanisms of self-assembled nanostructures of block copolymers during zone annealing
Understanding the ordering mechanisms of self-assembled nanostructures of block copolymers during zone annealing
复制标题
了解区域退火过程中嵌段共聚物自组装纳米结构的有序机制
DOI：
10.1063/1.4943864
复制
发表时间：
2016-03-21
影响因子：
4.4
通讯作者：
Lin, Jiaping
中科院分区：
文献类型：
--
作者：
Cong, Zhinan;Zhang, Liangshun;Lin, Jiaping
将基于动态自洽场理论的理论方法推广到研究区域退火下嵌段共聚物的定向自组装行为。从扫描速度、壁面偏好性和Flory-Huggins相互作用参数等方面讨论了嵌段共聚物微相分离纳米结构的有序化机制和取向调控。模拟结果表明，由于引入了嵌段共聚物的模板有序，通过降低区域退火的扫描速度，实现了长程有序纳米粒子。两种聚合物中的一种的表面富集通过微调嵌段共聚物的组成和壁的偏好来诱导无缺陷纳米结构的取向调制。此外，嵌段共聚物在不同区域的Flory-Huggins相互作用参数是设计用于产生具有单一取向的高度有序纳米结构的区域退火过程的主要因素。(C)2016 AIP Publishing LLC.
A theoretical method based on dynamic version of self-consistent field theory is extended to investigate directed self-assembly behaviors of block copolymers subjected to zone annealing. The ordering mechanisms and orientation modulation of microphase-separated nanostructures of block copolymers are discussed in terms of sweep velocity, wall preference, and Flory-Huggins interaction parameter. The simulated results demonstrate that the long-range ordered nanopatterns are achieved by lowering the sweep velocity of zone annealing due to the incorporation of templated ordering of block copolymers. The surface enrichment by one of the two polymer species induces the orientation modulation of defect-free nanostructures through finely tuning the composition of block copolymers and the preference of walls. Additionally, the Flory-Huggins interaction parameters of block copolymers in the distinct regions are main factors to design the zone annealing process for creating the highly ordered nanostructures with single orientation. (C) 2016 AIP Publishing LLC.