Phase behaviour and dynamical features of a two-dimensional binary mixture of active/passive spherical particles

Abstract

In this work we have characterized the phase behaviour and the dynamics of bidimensional mixtures of active and passive Brownian particles. We have evaluated state diagrams at several concentrations of the passive components finding that, while passive agents tend to hinder phase separation, active agents force crystal-like structures on passive colloids. In order to study how passive particles affect the dynamics of the mixture, we have computed the long-time diffusion coefficient of each species, concluding that active particles induce activity and super-diffusive behaviour on passive ones. Interestingly, at the density at which the system enters a MIPS state the active particles' diffusivity shows an inflection point and the passive particles' one goes through a maximum, due to the change in the dynamics of the active components, as shown in the displacement's probability distribution function.

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Cited by in corpus (22)

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• Non-reciprocity across scales in active mixtures
• Characterization of MIPS in a suspension of repulsive Active Brownian Particles through dynamical features
• Confinement-induced accumulation and spontaneous de-mixing of microscopic active-passive mixtures
• Phase separation of active Brownian particles in two dimensions: Anything for a quiet life
• Discovering dynamic laws from observations: the case of self-propelled, interacting colloids
• Critical behavior of quorum-sensing active particles
• Motility-induced coexistence of a hot liquid and a cold gas
• Derivation and analysis of a phase field crystal model for a mixture of active and passive particles
• Active Matter Shepherding and Clustering in Inhomogeneous Environments
• Ostwald-like ripening in the two-dimensional clustering of passive particles induced by swimming bacteria
• Re-entrant percolation in active Brownian hard disks
• AMEP: The Active Matter Evaluation Package for Python
• Demixing of two species via reciprocally concentration-dependent diffusivity
• Phase behaviors and dynamics of active particle systems in double-well potential
• Sorting of binary active-passive mixtures in designed microchannels
• Dynamics and rupture of doped Motility Induced Phase Peparation
• Island Hopping of active colloids
• The influence of active agent motility on SIRS epidemiological dynamics
• Self-organised structures in mixed active-passive suspensions due to hydrodynamic interactions
• Mobility-induced phase separation in a binary mixture of active Brownian particles
• Chiral flow in a binary mixture of two-dimensional active disks