Anomalous Diffusion of Symmetric and Asymmetric Active Colloids - Condensed Matter > Soft Condensed MatterReport as inadecuate




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Abstract: The stochastic dynamics of colloidal particles with surface activity-in theform of catalytic reaction or particle release-and self-phoretic effects isstudied analytically. Three different time scales corresponding to inertialeffects, solute redistribution, and rotational diffusion are identified andshown to lead to a plethora of different regimes involving inertial,propulsive, anomalous, and diffusive behaviors. For symmetric active colloids,a regime is found where the mean-squared displacement has a super-diffusive$t^{3-2}$ behavior. At the longest time scales, an effective diffusioncoefficient is found which has a non-monotonic dependence on the size of thecolloid.



Author: Ramin Golestanian

Source: https://arxiv.org/



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