Conelike Janus Composite Particles

Abstract

Conelike cross-linked PS particles\nare polymerized at a patchy emulsion interface. The PS particles synthesized\nin the dispersed paraffin phase immigrate toward the interface due\nto the Pickering effect. At the triple phase contact line, the particles\nare squeezed into cone shape under an outward convex interfacial tension\nmismatch. The conelike PS particles are adhered to paraffin sphere\nsurface and synchronously protected, which allows selective modifications\nof the two sides. The Janus particles can self-organize into superstructures\nin dispersions. Robust coatings are easily fabricated from the Janus\nparticles, whose wettability is tunable from highly adhesive for water\nto superhydrophobic by simply changing the size distribution of the\nJanus particles.