嵌段共聚物自组装形成螺旋结构的手性调控

Chiral Regulation of Single Helical Structures Formed by Self-assembly of Block Copolymers

本文利用自洽平均场理论研究了圆柱受限下,引入手性补丁图案诱导场对嵌段共聚物自组装形成的单螺旋结构的手性调控。研究发现,在圆柱孔径较小时,仅施加较为稀疏的补丁图案就可以获得完美的单一手性单螺旋结构。当受限圆柱的孔径较大时,需要通过增加补丁个数来改进诱导效果,但过于密集的图案会影响嵌段高分子自组装的热力学路径。通过引入合适的手性诱导场,可以在整个单螺旋相区实现手性调控。

In this work,we employ self-consistent field theory to investigate the chiral modulation of single helical structures formed by block copolymers under confinement within cylindrical nanopores,induced by the introduction of chiral patch patterns.Our study reveals that,for small pore diameters,the imposition of relatively sparse patch patterns is sufficient to attain a perfect single-handed helical structure.In cases where the constrained cylindrical pores possess larger diameters,improving the induction effect necessitates an increase in the number of patches;however,excessively dense patterns can impede the thermodynamic pathway of block copolymer self-assembly.By introducing appropriately tailored chiral induction fields,chirality control can be achieved throughout the entire single helix phase region.