Interrupted Motility Induced Phase Separation in Aligning Active Colloids

Motility-Induced Phase Separation

Self-propelled particles include both self-phoretic synthetic colloids and various micro-organisms. By continually consuming energy, they bypass the laws of equilibrium thermodynamics. These laws enforce the Boltzmann distribution in thermal equilibrium: the steady state is then independent of kinetic parameters. In contrast, self-propelled particles tend to accumulate where they move more slow...

Phase separation of biphasic mixture of active Janus colloids

Submitted for the MAR14 Meeting of The American Physical Society Phase separation of biphasic mixture of active Janus colloids JING YAN, Department of Materials Science, University of Illinois at Urbana-Champaign, MING HAN, ERIK LUIJTEN, Department of Materials Science, Northwestern University, STEVE GRANICK, Department of Materials Science, University of Illinois at Urbana-Champaign — Recently...

Motility-Induced Phase Separation of Active Particles in the Presence of Velocity Alignment

Haloing in bimodal magnetic colloids: the role of field-induced phase separation.

If a suspension of magnetic micrometer-sized and nanosized particles is subjected to a homogeneous magnetic field, the nanoparticles are attracted to the microparticles and form thick anisotropic halos (clouds) around them. Such clouds can hinder the approach of microparticles and result in effective repulsion between them [M. T. López-López, A. Yu. Zubarev, and G. Bossis, Soft Matter 6, 4346 (...

Depletion induced isotropic-isotropic phase separation in suspensions of rod-like colloids.

When non-adsorbing polymers are added to an isotropic suspension of rod-like colloids, the colloids effectively attract each other via depletion forces. We performed Monte Carlo simulations to study the phase diagram of such rod-polymer mixture. The colloidal rods were modeled as hard spherocylinders; the polymers were described as spheres of the same diameter as the rods. The polymers may over...