xu_ming_quan

Janus composites with two different components divided on the same object have gained growing interest in many fields, such as solid emulsion stabilizers, sensors, optical probes and self-propellers. Over the past twenty years, various synthesis methods have been developed including Pickering emulsion interfacial modification, block copolymer self-assembly, microfluidics, electro co-jetting, and swelling emulsion polymerization. Anisotropic shape and asymmetric spatial distribution of compositions and functionalities determine their unique performances. Rational design and large scale synthesis of functional Janus materials are crucial for the systematical characterization of performance and exploitation of practical applications.

Janus materials with two different chemical compositions compartmentalized onto the same object have witnessed a fast development due to their diversified performances from anisotropic structures. Rational design and controllable synthesis of the materials with tunable morphology and composition are the main concerns. Recent achievements and challenges are summarized.