Phase Behavior of Active Swimmers in Depletants: Molecular Dynamics and Integral Equation Theory

Abstract

We study the structure and phase behavior of a binary mixture where one of the components is self-propelling in nature. The inter-particle interactions in the system were taken from the Asakura-Oosawa model, for colloid-polymer mixtures, for which the phase diagram is known. In the current model version the colloid particles were made active using the Vicsek model for self-propelling particles. The resultant active system was studied by molecular dynamics methods and integral equation theory. Both methods produce results consistent with each other and demonstrate that the Vicsek model based activity facilitates phase separation, thus broadening the coexistence region.

5 figures, 5 pages

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Cited by in corpus (26)

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• Elasticity Induced Force Reversal Between Active Spinning Particles in Dense Passive Media
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• Anomalous dynamics of an elastic membrane in an active fluid
• Three-body correlations and conditional forces in suspensions of active hard disks
• Coarsening Dynamics in the Vicsek Model of Active Matter
• Estimation of the critical behavior in an active colloidal system with Vicsek-like interactions
• Relaxation in a Phase-separating Two-dimensional Active Matter System with Alignment Interaction
• Configurational temperature in active matter. I. Lines of invariant physics in the phase diagram of the Ornstein-Uhlenbeck model
• Configurational temperature in active matter. II. Quantifying the deviation from thermal equilibrium
• Effective potentials induced by mixtures of patchy and hard co-solutes
• Active-parameter polydispersity in the 2d ABP Yukawa model
• Skyrmion Lattice Phases in Thin Film Multilayer