Janus and patchy colloids at fluid interfaces

Understanding the fundamental behavior of chemically anisotropic Janus and patchy particles at fluid interfaces enables utilization of these colloids as solid surfactants for stabilization of emulsions and as building blocks for fabrication of functional and responsive materials. Here, we review recent progress on understanding the combined effects of particle-interface and particle-particle interactions on the surface activity and organization of Janus and patchy particles at fluid interfaces. We also highlight recent developments that harness these fundamental properties for applications in self-assembly and emulsion stabilization, and discuss some of the outstanding questions that warrant future investigation. The progress in the field opens new opportunities to pursue techniques for controlling interfacial rheology, directed motion, and the formulation of novel soft materials. (C) 2017 Elsevier Ltd. All rights reserved.