Wang Moyan, Chen Gangfeng, Hou Xiaojian, Luo Yunjun, Jin Bixin, Li Xiaoyu
Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, No.5 Zhongguancun South St., Beijing 100081, China.
Key Laboratory of High Energy Density Materials, MOE, Beijing Institute of Technology, No.5 Zhongguancun South St., Beijing 100081, China.
Polymers (Basel). 2023 May 31;15(11):2547. doi: 10.3390/polym15112547.
The craving for controllable assembly of geometrical nanostructures from artificial building motifs, which is routinely achieved in naturally occurring systems, has been a perpetual and outstanding challenge in the field of chemistry and materials science. In particular, the assembly of nanostructures with different geometries and controllable dimensions is crucial for their functionalities and is usually achieved with distinct assembling subunits via convoluted assembly strategies. Herein, we report that with the same building subunits of α-cyclodextrin (α-CD)/block copolymer inclusion complex (IC), geometrical nanoplatelets with hexagonal, square, and circular shapes could be produced by simply controlling the solvent conditions via one-step assembly procedure, driven by the crystallization of IC. Interestingly, these nanoplatelets with different shapes shared the same crystalline lattice and could therefore be interconverted to each other by merely tuning the solvent compositions. Moreover, the dimensions of these platelets could be decently controlled by tuning the overall concentrations.
从人工构建基元可控组装几何纳米结构的需求，这在自然发生的系统中是常规实现的，一直是化学和材料科学领域长期存在的重大挑战。特别是，具有不同几何形状和可控尺寸的纳米结构的组装对于其功能至关重要，并且通常通过复杂的组装策略使用不同的组装亚基来实现。在此，我们报告，使用相同的α-环糊精（α-CD）/嵌段共聚物包合物（IC）构建亚基，通过简单地经由一步组装程序控制溶剂条件，由IC的结晶驱动，可以制备出具有六边形、正方形和圆形形状的几何纳米片。有趣的是，这些具有不同形状的纳米片共享相同的晶格，因此仅通过调节溶剂组成就可以相互转化。此外，通过调节总体浓度可以适当地控制这些片层的尺寸。
