Micro-phase separation in two dimensional suspensions of self-propelled spheres and dumbbells.

Soft Matter

Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, USA.

Published: January 2016

We use numerical simulations to study the phase behavior of self-propelled spherical and dumbbellar particles interacting via micro-phase separation inducing potentials. Our results indicate that under the appropriate conditions, it is possible to drive the formation of two new active states; a spinning cluster crystal, i.e. an ordered mesoscopic phase having finite size spinning crystallites as lattice sites, and a fluid of living clusters, i.e. a two dimensional fluid where each "particle" is a finite size living cluster. We discuss the dynamics of these phases and suggest ways of extending their stability under a wide range of active forces.

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http://dx.doi.org/10.1039/c5sm02350eDOI Listing

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