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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2014

Polarization of active Janus particles

Résumé

We theoretically study the motion of surface-active Janus particles, driven by an effective slip velocity due to a non-uniform temperature or concentration field ψ. With parameters realized in thermal traps, we find that the torque exerted by the gradient ∇ψ inhibits rotational diffusion and favors alignment of the particle axes. In a swarm of active particles, this polarization adds a novel term to the drift velocity and modifies the collective behavior. Self-polarization in a non-uniform laser beam could be used for guiding hot particles along a given trajectory.
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Dates et versions

hal-01078025 , version 1 (27-10-2014)

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Thomas Bickel, Guillermo Zecua, Alois Würger. Polarization of active Janus particles. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2014, 89, pp.050303. ⟨10.1103/PhysRevE.89.050303⟩. ⟨hal-01078025⟩

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