self-propelled spherical particles. The particles are carbon-coated Janus particles, which are
propelled due<? format?> to diffusiophoresis in a near-critical water-lutidine mixture. At low
densities, we find that the driving stabilizes small clusters. At higher densities, the
suspension undergoes a phase separation into large clusters and a dilute gas phase. The
same qualitative behavior is observed in simulations of a minimal model for repulsive self …