Light-Driven Reversible Transformation between Self-Organized Simple Cubic Lattice and Helical Superstructure Enabled by a Molecular Switch Functionalized Nanocage
| Autor: | Zhigang Zheng, Cong-Long Yuan, Dong Shen, Quan Li, Jian-Qiu Jin, Zhen Liu, Yan-qing Lu, Kang Zhou, Weian Zhang, Hari Krishna Bisoyi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Molecular switch
Materials science Mechanical Engineering 02 engineering and technology Cubic crystal system 010402 general chemistry 021001 nanoscience & nanotechnology Atomic packing factor Smart material 01 natural sciences Silsesquioxane 0104 chemical sciences chemistry.chemical_compound Nanocages chemistry Mechanics of Materials Liquid crystal Chemical physics Lattice (order) General Materials Science 0210 nano-technology |
| Zdroj: | Advanced Materials. 30:1800237 |
| ISSN: | 0935-9648 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text