Artificial chemotaxis of phoretic swimmers: instantaneous and long-time behaviour

@article{TtuleaCodrean2018ArtificialCO,
  title={Artificial chemotaxis of phoretic swimmers: instantaneous and long-time behaviour},
  author={Maria Tătulea-Codrean and Eric Lauga},
  journal={Journal of Fluid Mechanics},
  year={2018},
  volume={856},
  pages={921 - 957}
}
Phoretic swimmers are a class of artificial active particles that has received significant attention in recent years. By making use of self-generated gradients (e.g. in temperature, electric potential or some chemical product) phoretic swimmers are capable of self-propulsion without the complications of mobile body parts or a controlled external field. Focusing on diffusiophoresis, we quantify in this paper the mechanisms through which phoretic particles may achieve chemotaxis, both at the… 
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19 Citations
Background Citations
7
Methods Citations
2

19 Citations

Phoretic and hydrodynamic interactions of weakly confined autophoretic particles.

This work proposes a first model for the interaction of phoretic particles in Hele-Shaw confinement and shows that in this limit, hydrodynamic and phoretIC interactions share not only the same scaling but also the same form, albeit in opposite directions.

Hydrochemical interactions in dilute phoretic suspensions: From individual particle properties to collective organization

Janus phoretic colloids (JPs) self-propel as a result of self-generated chemical gradients and exhibit spontaneous nontrivial dynamics within phoretic suspensions, on length scales much larger than…

Modeling chemo-hydrodynamic interactions of phoretic particles: A unified framework

Phoretic particles exploit local self-generated physico-chemical gradients to achieve self-propulsion at the micron scale. The collective dynamics of a large number of such particles is currently the…

Active fluids - Interactions and collective dynamics in phoretic suspensions

Diffusiophoresis is a physico-chemical mechanism by which certain microscopic colloids drift through gradients of a solute concentration field in a fluid. This mechanism is exploited by autophoretic…

Chemokinesis-driven accumulation of active colloids in low-mobility regions of fuel gradients

This work suggests a novel strategy of exploiting chemokinesis to effect accumulation of motile colloids in desired areas using a Fokker–Planck theoretical model and experiments.

Hydrochemical interactions of phoretic particles: a regularized multipole framework

This work proposes a regularized multipole framework, directly inspired by the force coupling method (FCM), to model phoretic suspensions, and relies on grid-based volume averages of the concentration field to compute the particle surface concentration moments.

Stochastic dynamics of dissolving active particles

This work develops and compares two distinct chemical models for the decay of a swimmer, taking into account the material composition and nature of the chemical or enzymatic reaction at its surface, and investigates mathematically the dynamics of degradable active particles.

Estimating the velocity of chemically-driven Janus colloids considering the anisotropic concentration field

The application of the active colloids is strongly related to their self-propulsion velocity, which is controlled by the generated anisotropic concentration field. We investigated the effect of this…

Autophoresis of two adsorbing/desorbing particles in an electrolyte solution

Classical diffusiophoresis describes the motion of particles in an electrolyte or non-electrolyte solution with an imposed concentration gradient. We investigate the autophoresis of two particles in…

Active Janus colloids at chemically structured surfaces.

This study uses a point-particle approximation combined with a multipole expansion in order to discuss the effects of pattern geometry and chemical contrast on the particle trajectories, and considers planar walls patterned with chemical steps and stripes.

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