文献类型：期刊文献

英文题名：Light-Driven Reversible Transformation between Self-Organized Simple Cubic Lattice and Helical Superstructure Enabled by a Molecular Switch Functionalized Nanocage

作者：Zhou, Kang[1];Bisoyi, Hari Krishna[2,3];Jin, Jian-Qiu[4];Yuan, Cong-Long[1];Liu, Zhen[1];Shen, Dong[1];Lu, Yan-Qing[5];Zheng, Zhi-Gang[1];Zhang, Weian[4];Li, Quan[2,3]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA;[3]Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA;[4]East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[5]Nanjing Univ, Natl Lab Solid State Microstruct, Collaborat Innovat Ctr Adv Microstruct & Colleagu, Nanjing 210093, Jiangsu, Peoples R China

年份：2018

卷号：30

期号：26

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20182605368140);WOS:【SCI-EXPANDED(收录号:WOS:000435929000018)】；

基金：K.Z., H.K.B., and J.-Q.J. contributed equally to this work. The authors acknowledge the supports from the National Science Foundation of China (Nos. 61435008, 61575063, 21574039), Shanghai Rising-Star Program (No. 17QA1401100), and the Ohio Third Frontier.

语种：英文

外文关键词：1D helical superstructure; 3D simple cubic lattice; light-driven molecular switch; photoinduced phase transition; stimuli-responsive material

摘要：Self-organized stimuli-responsive smart materials with adjustable attributes are highly desirable for a plethora of device applications. Simple cubic lattice is quite uncommon in soft condensed matter due to its lower packing factor. Achieving a stable simple cubic soft lattice and endowing such a lattice with dynamic reconstruction capability solely by a facile light irradiation are of paramount significance for both fundamental studies and engineering explorations. Herein, an elegant stable self-organized simple cubic soft lattice, i.e., blue phase II, in a chiral liquid crystal (LC) system is disclosed, which is stable down to room temperature and exhibits both reversible lattice deformation and transformation to a helical superstructure, i.e., cholesteric LC, by light stimulation. Such an amazing trait is attained by doping a judiciously designed achiral photoresponsive molecular switch functionalized polyhedral oligomeric silsesquioxane nanocage into a chiral LC host. An unprecedented reversible collapse and reconstruction of such a high symmetric simple cubic blue phase II driven by light has been achieved. Furthermore, a well-defined conglomerate micropattern composed of simple cubic soft lattice and helical superstructure, which is challenging to fabricate in organic and inorganic crystalline materials, is produced using photomasking technology. Moreover, the promising photonic application based on such a micropattern is demonstrated.