Minimal model of active colloids highlights the role of mechanical interactions in controlling the emergent behavior of active matter

Abstract

Minimal models of active Brownian colloids consisting of self-propelled spherical particles with purely repulsive interactions have recently been identified as excellent quantitative testing grounds for theories of active matter and have been the subject of extensive numerical and analytical investigation. These systems do not exhibit aligned or flocking states, but do have a rich phase diagram, forming active gases, liquids and solids with novel mechanical properties. This article reviews recent advances in the understanding of such models, including the description of the active gas and its swim pressure, the motility-induced phase separation and the high-density crystalline and glassy behavior.

12 pages; version accepted in Current Opinions on Colloid & Interface Science

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Cited by in corpus (70)

• Emergent behavior in active colloids
• Topological active matter
• Inertial effects of self-propelled particles: from active Brownian to active Langevin motion
• The physics of active polymers and filaments
• Dense active matter model of motion patterns in confluent cell monolayers
• Clustering of microswimmers: Interplay of shape and hydrodynamics
• An active approach to colloidal self-assembly
• Conformational properties of active semiflexible polymers
• Active phase separation by turning toward regions of higher density
• Light-controlled Assembly of Active Colloidal Molecules
• A self-driven phase transition drives Myxococcus xanthus fruiting body formation
• A classical nucleation theory description of active colloid assembly
• Ideal bulk pressure of active Brownian particles
• Traveling fronts in active-passive particle mixtures
• Shape and Displacement Fluctuations in Soft Vesicles Filled by Active Particles
• Cell division and death inhibit glassy behaviour of confluent tissues
• Mode-Coupling Theory for Active Brownian Particles
• Nonlinear dynamics of a chemically-active drop: from steady to chaotic self-propulsion
• Mechanical pressure and momentum conservation in dry active matter
• Flocking without alignment interactions in attractive active Brownian particles
• Diffusion, subdiffusion and localisation of active colloids in random post lattices
• Phase co-existence in bidimensional passive and active dumbbell systems
• Curvature-dependent tension and tangential flows at the interface of motility-induced phases
• Steady-state distributions of ideal active Brownian particles under confinement and forcing
• Phase separation and multibody effects in three-dimensional active Brownian particles
• A review of active matter reviews
• How many dissenters does it take to disorder a flock?
• Kinetics of motility-induced phase separation and swim pressure
• Interparticle torques suppress motility-induced phase separation for rodlike particles
• Emergent collective behavior of active Brownian particles by visual perception
• Local stress and pressure in an inhomogeneous system of spherical active Brownian particles
• Thermodynamics of emergent structure in active matter
• The entropy production of an active particle in a box
• Effective equilibrium states in mixtures of active particles driven by colored noise
• Self-assembly of active amphiphilic Janus particles
• Microscopic derivation of the hydrodynamics of active-Brownian-particle suspensions
• Van't Hoff's law for active suspensions: the role of the solvent chemical potential
• Fractal aggregation of active particles
• Designing, Synthesizing and Modeling Active Fluids
• Active particles with polar alignment in ring-shaped confinement
• Enhanced persistence and collective migration in cooperatively aligning cell clusters
• Generalized Archimedes' principle in active fluids
• Active matter, microreversibility, and thermodynamics
• Single particle motion and collective dynamics in Janus motor systems
• Inertial effects on rectification and diffusion of active Brownian particles in an asymmetric channel
• A mechanism for anomalous transport in chiral active liquids
• Competing Active and Passive Interactions Drive Amoeba-like Living Crystallites and Ordered Bands
• Phase separation dynamics of polydisperse colloids: a mean-field lattice-gas theory
• Rheological similarities between dense self-propelled and sheared particulate systems
• Confinement-induced alternating interactions between inclusions in an active fluid
• Forces in inhomogeneous open active-particle systems
• Response of active Brownian particles to boundary driving
• Effective forces between active polymers
• The most probable path of Active Ornstein-Uhlenbeck particles
• Simulating wet active polymers by multiparticle collision dynamics
• Periodic patterns displace active phase separation
• Statistical Mechanics and Hydrodynamics of Self-Propelled Hard Spheres
• Anisotropic run-and-tumble-turn dynamics
• Activity-assisted barrier-crossing of self-propelled colloids over parallel microgrooves
• Non-Brownian diffusion and chaotic rheology of autophoretic disks
• Thermodynamic formalism for transport coefficients with an application to the shear modulus and shear viscosity
• Active dipolar spheroids in shear flow and transverse field: Population splitting, cross-stream migration and orientational pinning
• Constructing Solutions to Two-Way Diffusion Problems
• Effect of speed fluctuations on the collective dynamics of active disks
• Vicsek Model Meets DBSCAN: Cluster Phases in the Vicsek Model
• Thermodynamic nature of irreversibility in active matter
• Flocking transition in phoretically interacting active particles with pinning disorder
• An Infinite Set of Integral Formulae for Polar, Nematic, and Higher Order Structures at the Interface of Motility-Induced Phase Separation
• Hydrodynamics of simple active liquids: the emergence of velocity correlations
• Mass-based separation of active Brownian particles in an asymmetric channel