Motility-induced clustering of active particles under soft confinement

Abstract

We investigate the structural and dynamic properties of active Brownian particles (APs) confined within a soft annulus-shaped channel. Depending on the strength of the confinement and the Péclet number, we observe a novel re-entrant behavior that is not present in unconfined systems. Our findings are substantiated by numerical simulations and analytical considerations, revealing that this behavior arises from the strong coupling between the Péclet number and the effective confining dimensionality of the APs. Beyond highlighting the important influence of soft boundaries on APs, our research holds significance for future applications of micro-robotic systems.

References in corpus (33)

• Active Particles in Complex and Crowded Environments
• The Mechanics and Statistics of Active Matter
• Motility-Induced Phase Separation
• Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
• Athermal Phase Separation of Self-Propelled Particles with no Alignment
• Emergence of macroscopic directed motion in populations of motile colloids
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• Microswimmers in Patterned Environments
• Phase behaviour of active Brownian particles: The role of dimensionality
• Phototaxis of synthetic microswimmers in optical landscapes
• Cooperative Motion of Active Brownian Spheres in Three-Dimensional Dense Suspensions
• Nonequilibrium equation of state in suspensions of active colloids
• Active particles with soft and curved walls: Equation of state, ratchets, and instabilities
• Dynamical mean-field theory and weakly non-linear analysis for the phase separation of active Brownian particles
• Motility-induced phase separation and coarsening in active matter
• Run-and-tumble in a crowded environment: persistent exclusion process for swimmers
• A self-driven phase transition drives Myxococcus xanthus fruiting body formation
• Phase Diagram of Active Brownian Spheres: Crystallization and the Metastability of Motility-Induced Phase Separation
• Ideal bulk pressure of active Brownian particles
• Dynamics and density distribution of strongly confined noninteracting nonaligning self-propelled particles in a nonconvex boundary
• Tuning the motility and directionality of self-propelled colloids
• Phase separation and multibody effects in three-dimensional active Brownian particles
• Mechanical Theory of Nonequilibrium Coexistence and Motility-Induced Phase Separation
• Self-propulsion mechanism of active Janus particles in near-critical binary mixtures
• Active Brownian particles near straight or curved walls: Pressure and boundary layers
• Hydrodynamic interactions in dense active suspensions: from polar order to dynamical clusters
• Sedimentation of self-propelled Janus colloids: polarization and pressure
• Universal scaling in active single-file dynamics
• Active ideal sedimentation: Exact two-dimensional steady states
• Active Brownian Particles in Random and Porous Environments
• Log it: How to fit an active Brownian particle's mean squared displacement with improved parameter estimation
• Non-monotonic effect of confinement on the glass transition
• Nonexistence of motility induced phase separation transition in one dimension

Cited by in corpus (5)

• Dynamical metastability and re-entrant localization of trapped active elements with speed and orientation fluctuations
• Negative drag force on beating flagellar-shaped bodies in active fluids
• Curvature dependent dynamics of a bacterium confined in a giant unilamellar vesicle
• Confinement-induced collective motion in suspensions of run-and-tumble particles
• Fluctuations of driven probes reveal nonequilibrium transitions in complex fluids