A magnetic assembly approach to chiral superstructures

• 成果类型: Article
• 署名作者: Li, Zhiwei; Fan, Qingsong; Ye, Zuyang; Wu, Chaolumen; Wang, Zhongxiang; Yin, Yadong
• 署名单位: University of California System; University of California Riverside; Northwestern University; Northwestern University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9460
• DOI: 10.1126/science.adg2657
• 发表日期: 2023-06-30
• 页码: 1384-1390
• 关键词: ellipsoidal particles; nanostructures; gold; deposition; transport

摘要

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.