Investigations of host-guest interactions at water-oil (w/o) interfaces are limited in single emulsion systems producing simple self-assembled objects with limited uses. Here, within hierarchically ordered water-in-oil-in-water (w/o/w) multiple emulsion droplets, interfacial self-assembly of (polynorbornene-graft-polystyrene)-block-(polynorbornene-graft-polyethylene glycol) (PNPS-b-PNPEG) bottlebrush block copolymers can be precisely controlled through host-guest interactions. α-Cyclodextrin (α-CD) in the aqueous phase can thread onto PEG side chains of the bottlebrush surfactants adsorbed at the w/o interface, leading to dehydration and collapsed chain conformation of the PEG block. Consequently, spherical curvature of the w/o internal droplets increases with the increased asymmetry of the bottlebrush molecules, producing photonic supraballs with precisely tailored structural parameters as well as photonic bandgaps. This work provides a simple but highly effective strategy for precise manipulation of complex emulsion systems applicable in a variety of applications, such as photonic pigments, cosmetic products, pesticides, artificial cells, etc.

中文翻译：

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主客体相互作用介导的环糊精和洗瓶刷表面活性剂的界面共组装用于精确可调的光子超级球

对水-油（w/o）界面的主客体相互作用的研究仅限于单一乳液系统，该系统产生用途有限的简单自组装物体。在这里，在分层有序的水包水包油包水（w/o/w）多重乳液液滴内，（聚降冰片烯-接枝-聚苯乙烯）-嵌段-（聚降冰片烯-接枝-聚乙二醇）（PNPS）的界面自组装- b -PNPEG) 洗瓶刷嵌段共聚物可以通过主客体相互作用进行精确控制。水相中的α-环糊精( α -CD)可以缠绕在W/O界面处吸附的洗瓶刷表面活性剂的PEG侧链上，导致PEG嵌段脱水和折叠链构象。因此，无内部液滴的球形曲率随着洗瓶刷分子不对称性的增加而增加，产生具有精确定制的结构参数以及光子带隙的光子超级球。这项工作为精确操纵复杂乳液系统提供了一种简单但高效的策略，适用于多种应用，例如光子颜料、化妆品、农药、人造细胞等。