Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China.
Angew Chem Int Ed Engl. 2016 Sep 26;55(40):12522-7. doi: 10.1002/anie.201607059. Epub 2016 Sep 8.
The self-organization of pre-assembled aggregates is an efficient stepwise strategy for fabricating nanostructures with a second level of hierarchy. Herein, we report that anisotropic spindle-like micelles, self-assembled from polypeptide graft copolymers with rigid backbones, can serve as ideal pre-assembled subunits for constructing one-dimensional materials with hierarchical structures. By adding organic solvents and dialyzing against water, reactive points can be generated at the ends of the spindle-like micelles, which subsequently drive the anisotropic micelles to grow as rods in a chain and eventually self-assemble into hierarchical nanowires in a stepwise manner. The second self-assembly step is a hierarchical process that resembles step polymerization. Hierarchical structures can be precisely synthesized by this new type of polymerization. These nanostructures can be tailored by the activity of the reactive points, which depends on the nature of the solvent and the molecular architecture.
预组装聚集体的自组装是一种构建具有二级层次结构的纳米结构的有效逐步策略。在此，我们报告了一种各向异性的纺锤形胶束，它由刚性主链的多肽接枝共聚物自组装而成，可用作构建具有层次结构的一维材料的理想预组装亚单位。通过添加有机溶剂并用水透析，可以在纺锤形胶束的末端生成反应点，随后这些反应点驱动各向异性胶束在链中作为棒状生长，并最终以逐步的方式自组装成分级纳米线。第二步自组装是一个类似于逐步聚合的分级过程。通过这种新型聚合可以精确合成分级结构。这些纳米结构可以通过反应点的活性进行定制，而反应点的活性取决于溶剂的性质和分子结构。
