A Step-by-Step Strategy for Controlled Preparations of Complex Heterostructured Colloids

作者：Chaoran Li, Yingying Yu, Liwei Wang, Shumin Zhang, Jinrun Liu, Jinpan Zhang, Ao‐Bo Xu, Zhiyi Wu, Jintao Tong, Shenghua Wang, Mengqi Xiao, Yaosi Fang, Jie Yao, Alexander A. Solovev, Bin Dong, Le He · 发表于：Chemistry of Materials · 年份：2019 · DOI：10.1021/acs.chemmater.9b03917 · 被引用次数：11 · 研究领域：Pickering emulsions and particle stabilization、Micro and Nano Robotics、Advanced Materials and Mechanics

Interest in the preparation of colloidal heterostructures with complex shapes, structures, and spatial compositions is driven by their unique optical, electrical, magnetic, or rheological properties. Despite recent advances, it is highly desired but challenging to further extend the library of heterostructured particles with increased degrees of complexity. Here we report a general step-by-step strategy for controlled preparations of complex heterostructured colloids with various structures and compositions. A local-curvature-controlled emulsion polymerization method is first employed for site-selective growth of secondary polystyrene nanostructures on different nonspherical colloidal seeds. The following functionalization and selective removal steps further increase the degree of particle complexity. We also demonstrate a new type of chemically powered nanomotors based on heterostructured α-Fe 2 O 3 @SiO 2 /Pt particles. This growth strategy is a versatile, general method suitable for the preparation of complex heterostructured particles with tailored structures, compositions, and functionalities, paving the way for their applications for various purposes.