A magnetic assembly approach to chiral superstructures
A magnetic assembly approach to chiral superstructures
复制标题
DOI：
10.1126/science.adg2657
复制
发表时间：
2023-06-30
期刊：
影响因子：
56.9
通讯作者：
Yin, Yadong
中科院分区：
文献类型：
--
作者：
Li, Zhiwei;Fan, Qingsong;Yin, Yadong
胶体组装成手性超结构通常是用模板或光刻图案化方法完成的，这些方法仅适用于在窄尺寸范围内具有特定组成和形态的材料。在这里，手性超结构可以通过磁性组装任何化学成分的材料在所有尺度上快速形成，从分子到纳米和微观结构。我们表明，四极场的手征是由永磁体在空间中一致的场旋转引起的。将手征场应用于磁性纳米颗粒产生由样品处的场强度和磁体的取向控制的长程手征超结构。通过将客体分子如金属、聚合物、氧化物、半导体、染料和荧光团并入磁性纳米结构中，能够将手性转移到任何非手性分子。
Colloidal assembly into chiral superstructures is usually accomplished with templating or lithographic patterning methods that are only applicable to materials with specific compositions and morphologies over narrow size ranges. Here, chiral superstructures can be rapidly formed by magnetically assembling materials of any chemical compositions at all scales, from molecules to nano- and microstructures. We show that a quadrupole field chirality is generated by permanent magnets caused by consistent field rotation in space. Applying the chiral field to magnetic nanoparticles produces long-range chiral superstructures controlled by field strength at the samples and orientation of the magnets. Transferring the chirality to any achiral molecules is enabled by incorporating guest molecules such as metals, polymers, oxides, semiconductors, dyes, and fluorophores into the magnetic nanostructures.