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由对称和非对称胶体环自组装的分层、高度开放的微管和柱状液晶
作者:小柯机器人 发布时间:2021/11/24 16:09:28

中国科学院化学研究所刘冰团队开发了由对称和非对称胶体环自组装成分层、高度开放的微管和柱状液晶的策略。相关研究成果发表在2021年11月20日出版的国际学术期刊《德国应用化学》。

使用简单的构建单元来生产分层结构和多孔结构材料是非常理想的。环是简单的胶体颗粒,但其内腔独特。

该文中,研究人员报告了由耗尽力介导的具有可调不对称性的胶体环的自组装(SA),并证明了从微管、柔性链、(塑料)晶体到高度开放的液晶(LCs)的各种多孔胶体上层结构可以沿预先设计的SA路径形成。特别是,SA分为二元或三元系统。大环首先通过捕获较小的环来形成复杂的环中环和环中环组件,作为新的构建块,这些环可以进一步形成多壁微管和开放柱状液晶。

此外,在不对称环中发现了具有交替柱内堆积的塑性柱状液晶。具有胶体环的SA为构建分层多孔有序超材料开辟了新的途径。

附:英文原文

Title: Hierarchical, Highly Open Microtubes and Columnar Liquid Crystals Self-Assembled from Symmetrical and Asymmetrical Colloidal Rings

Author: Linna Wang, Shang Shi, Zhang Luo, Na Qu, Bing Liu

Issue&Volume: 2021-11-20

Abstract: The use of simple building blocks to produce hierarchical and porous structured materials is highly desired. Rings are simple colloidal particles but unique for their internal cavities. Here we report the self-assembly (SA) of colloidal rings with tunable asymmetry mediated by a depletion force and demonstrate a variety of porous colloidal superstructure from microtubes, flexible chains, (plastic) crystals to highly open liquid crystals (LCs) can be formed along the predesigned SA paths. In particular, the SA is staged in binary or ternary systems. Large rings first form complex ring-in-ring and ring-in-ring-in-ring assemblies by capturing smaller rings, which, as new building blocks, can further form multi-walled microtubes and open columnar LCs. Moreover, a plastic columnar LC with alternating intracolumnar stacking is found from asymmetrical rings. The SA with colloidal rings opens a new avenue to construct hierarchical and porous ordered metamaterials.

DOI: 10.1002/anie.202112507

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202112507

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx