Ye Zuyang, Li Zhiwei, Feng Ji, Wu Chaolumen, Fan Qingsong, Chen Chen, Chen Jinxing, Yin Yadong
Department of Chemistry, University of California, Riverside, California 92521, United States.
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China.
ACS Nano. 2023 Sep 26;17(18):18517-18524. doi: 10.1021/acsnano.3c06461. Epub 2023 Sep 5.
Incorporating stimuli-responsive mechanisms into chiral assemblies of nanostructures offers numerous opportunities to create optical materials capable of dynamically modulating their chiroptical properties. In this study, we demonstrate the formation of chiral superstructures by assembling FeO@polyaniline hybrid nanorods by using a gradient magnetic field. The resulting superstructures exhibit a dual response to changes in both the magnetic field and solution pH, enabling dynamic regulation of the position, intensity, and sign of its circular dichroism peaks. Such responsiveness allows for convenient control over the optical rotatory dispersion properties of the assemblies, which are further integrated into the design of a chiroptical switch that can display various colors and patterns when illuminated with light of different wavelengths and polarization states. Finally, an optical information encryption system is constructed through the controlled assembly of the hybrid nanorods to showcase the potential opportunities for practical applications brought by the resulting responsive chiral superstructures.
将刺激响应机制引入纳米结构的手性组装体中，为创造能够动态调节其手性光学性质的光学材料提供了众多机会。在本研究中，我们展示了通过使用梯度磁场组装FeO@聚苯胺混合纳米棒来形成手性超结构。所得超结构对磁场和溶液pH值的变化表现出双重响应，能够动态调节其圆二色性峰的位置、强度和符号。这种响应性使得能够方便地控制组装体的旋光色散性质，这些性质进一步集成到手性光学开关的设计中，该开关在用不同波长和偏振态的光照射时可以显示各种颜色和图案。最后，通过混合纳米棒的可控组装构建了一个光学信息加密系统，以展示所得响应性手性超结构带来的实际应用潜在机会。
