Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.018301
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Funding
- EPSRC [EP/J007404]
- Swedish Research Council [350-2012-274]
- German Research Foundation (DFG) [WI 4170/1-2]
- Royal Society Research Professorship
- Engineering and Physical Sciences Research Council [EP/J007404/1] Funding Source: researchfish
- EPSRC [EP/J007404/1] Funding Source: UKRI
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We investigate the phase behavior and kinetics of a monodisperse mixture of active (i.e., self-propelled) and passive isometric Brownian particles through Brownian dynamics simulations and theory. As in a purely active system, motility of the active component triggers phase separation into a dense and a dilute phase; in the dense phase, we further find active-passive segregation, with rafts of passive particles in a sea of active particles. We find that phase separation from an initially disordered mixture can occur with as little as 15% of the particles being active. Finally, we show that a system prepared in a suitable fully segregated initial state reproducibly self-assembles an active corona, which triggers crystallization of the passive core by initiating a compression wave. Our findings are relevant to the experimental pursuit of directed self-assembly using active particles.
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