Helical structures at different scales endow functional materials with special optical, electrical, and magnetic properties. However, methods for constructing and regulating single‐handed helicity, particularly complex 3D hierarchical structures, remain limited. In this study, co‐self‐assembly process combined with emulsion droplets is used to produce the various well‐defined 3D hollow superstructures of conducting polyaniline (PANI) with single‐handed helicity. The chirality of PANI is induced using enantiomeric r‐ or s‐camphorsulfonic acid as a dopant; the chirality of the dopant is then transferred to the supramolecular chirality of PANI assemblies and consequently to the helicity of 3D superstructures by incorporating emulsion droplets to serve collectively as soft templates. The twisting and anisotropism of these superstructures vary with the enhancement of the supramolecular chirality and result in the transformation of their morphologies from seashell‐like to spindle‐like and their cavity becoming more slender than their original shape. Due to the supramolecular chirality and hierarchical characteristics of these superstructures, enhanced microwave absorption performance is observed under a filler content of as low as 20 wt%, suggesting their promising application as microwave absorbers.

中文翻译：

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具有增强的微波吸收特性的自组装3D螺旋空心上部结构

不同尺度的螺旋结构赋予功能材料特殊的光学，电和磁性能。但是，构造和调节单手螺旋结构（尤其是复杂的3D层次结构）的方法仍然有限。在这项研究中，共自组装过程与乳液液滴的结合被用于产生具有单手螺旋性的导电聚苯胺（PANI）的各种定义明确的3D中空上部结构。使用对映体r-或s诱导PANI的手性樟脑磺酸作为掺杂剂; 然后，通过掺入乳液液滴共同充当软模板，将掺杂剂的手性转移到PANI组件的超分子手性，从而转移到3D超结构的螺旋性。这些超结构的扭曲和各向异性随着超分子手性的增强而变化，并导致其形态从贝壳状转变为纺锤状，并且其腔变得比原始形状更细长。由于这些超结构的超分子手性和分级特性，在低至20 wt％的填料含量下观察到增强的微波吸收性能，表明它们有望用作微波吸收剂。