title: Micropore extrusion-induced alignment transition from perpendicular to parallel of cylindrical domains in block copolymers.
abstract: The orientation transition from perpendicular to parallel alignment of PEO cylindrical domains of PEO-b-PMA(Az) films has been demonstrated by extruding the block copolymer (BCP) solutions through a micropore of a plastic gastight syringe. The parallelized orientation of PEO domains induced by this micropore extrusion can be recovered to perpendicular alignment via ultrasonication of the extruded BCP solutions and subsequent annealing. A plausible mechanism is proposed in this study. The BCP films can be used as templates to prepare nanowire arrays with controlled layers, which has enormous potential application in the field of integrated circuits.
authors.affiliation: School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100191, P. R. China. chenaihua@buaa.edu.cn.
authors.forename: Ting
authors.initials: T
authors.lastname: Qu
authors.forename: Yongbin
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zongbo
authors.initials: Z
authors.lastname: Li
authors.forename: Pingping
authors.initials: P
authors.lastname: Wang
authors.forename: Shubo
authors.initials: S
authors.lastname: Cao
authors.forename: Yawei
authors.initials: Y
authors.lastname: Xu
authors.forename: Yayuan
authors.initials: Y
authors.lastname: Li
authors.forename: Aihua
authors.initials: A
authors.lastname: Chen