Self-assembly of chiral block copolymers (BCPs*) can give rise to ordered chiral nanostructures, that is, a helical phase (H* phase), via chirality transfer from the molecular level to mesoscale. In the present work, we reported the self-assembly of BCPs* under one-dimensional spatial confinement. The morphological dependence of self-assembled BCPs* on the molecular weights and the film thickness was investigated. As chiral nanostructures, the H* phase can be formed in bulk, nonchiral nanostructures that were observed in the thin films. Also, the topology effect of self-assembly of BCPs* was examined. The self-assembly of BCPs* with a star-shaped topology exhibited a distinct morphology compared with that of linear BCPs*. The present work provides new insight into the chirality transfer of macromolecules under spatial confinement.

中文翻译：

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薄膜中手性嵌段共聚物的受限自组装

手性嵌段共聚物 (BCPs*) 的自组装可以通过从分子水平到中尺度的手性转移产生有序的手性纳米结构，即螺旋相 (H* 相)。在目前的工作中，我们报道了一维空间限制下 BCP* 的自组装。研究了自组装 BCP* 对分子量和薄膜厚度的形态依赖性。作为手性纳米结构，H* 相可以形成在薄膜中观察到的块状非手性纳米结构。此外，还检查了 BCP* 自组装的拓扑效应。与线性 BCP* 相比，具有星形拓扑结构的 BCP* 自组装表现出明显的形态。目前的工作为空间限制下大分子的手性转移提供了新的见解。