文献类型：期刊文献

英文题名：Understanding the ordering mechanisms of self-assembled nanostructures of block copolymers during zone annealing

作者：Cong, Zhinan[1];Zhang, Liangshun[1];Wang, Liquan[1];Lin, Jiaping[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, State Key Lab Bioreactor Engn, Key Lab Ultrafine Mat,Minist Educ,Sch Mat Sci & E, Shanghai 200237, Peoples R China

年份：2016

卷号：144

期号：11

外文期刊名：JOURNAL OF CHEMICAL PHYSICS

收录：;EI(收录号：20161302152078);WOS:【SCI-EXPANDED(收录号:WOS:000373384100043)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 51203049, 21574040, and 21234002) and the Fundamental Research Funds for the Central Universities. Support from 111 Project (No. B14018) is also appreciated. The authors are also grateful to the anonymous reviewers for their comments and suggestions, which result in an improvement of the paper.

语种：英文

外文关键词：Mean field theory - Molecular orbitals - Annealing - Modulation - Surface defects - Self assembly - Nanostructures

摘要：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.