Phoretic Self-Propulsion

2016/09/12 by Jeffrey L. Moran, Jonathan D. Posner · 14 citations
Physics and Astronomy · Engineering · Materials Science · #Micro and Nano Robotics #Microfluidic and Bio-sensing Technologies #Pickering emulsions and particle stabilization

paper · pdf · doi:10.1146/annurev-fluid-122414-034456

Abstract

It is well-known that micro- and nanoparticles can move by phoretic effects in response to externally imposed gradients of scalar quantities such as chemical concentration or electric potential. A class of active colloids can propel themselves through aqueous media by generating local gradients of concentration and electrical potential via surface reactions. Phoretic active colloids can be controlled using external stimuli and can mimic collective behaviors exhibited by many biological swimmers. Low–Reynolds number physicochemical hydrodynamics imposes unique challenges and constraints that must be understood for the practical potential of active colloids to be realized. Here, we review the rich physics underlying the operation of phoretic active colloids, describe their interactions and collective behaviors, and discuss promising directions for future research.

Citations

• Colloid Transport by Interfacial Forces
• The hydrodynamics of swimming microorganisms
• Motion of a particle generated by chemical gradients. Part 2. Electrolytes

Cited by

• Shear induced migration of microswimmers in pressure-driven channel flow
• Reciprocal theorem for ion-releasing colloidal particles
• Modeling complex motility patterns for autophoretic microswimmers
• Inferring Surface Slip in Active Colloids from Flow Fields Using Physics-Informed Neural Networks
• Bubble-Driven Flow Transitions in Evaporating Active Droplets on Structured Surfaces
• Electrokinetic Effects on Flow and Ion Transport in Charge-Patterned Corrugated Nanochannels
• Granular fluid in an arbitrary external potential: spontaneous convection, self-phoresis
• Instability and self-propulsion of flexible autophoretic filaments
• Clustering-induced self-propulsion of isotropic autophoretic particles
• Active Heat Transfer Fluids (AHTF): Enhancement of Convective Heat Transfer by Bubble-Driven Self-Propelled Microparticles
• Microswimming in viscoelastic fluids
• Marangoni swimmer pushing particle raft under 1D confinement
• Emergence of run-and-tumble-like swimming in self-propelling artificial swimmers in soft microchannels
• Physicochemical Hydrodynamics of Droplets out of Equilibrium: A Perspective Review

Related

• Hydrodynamic simulations of self-phoretic microswimmers
• Unravelling the role of phoretic and hydrodynamic interactions in active colloidal suspensions
• Enhanced phoretic self-propulsion of active colloids through surface charge asymmetry
• Effective squirmer models for self-phoretic chemically active spherical colloids
• Clustering-induced self-propulsion of isotropic autophoretic particles