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Communication: Escape kinetics of self-propelled Janus particles from a cavity: Numerical simulations
1. Janus Particle Synthesis, Self-Assembly and Applications, edited by S. Jiang and S. Granick (RSC, Cambridge, 2012).
16.From a dimensional point of view D0 should be compared with v0xL, which in the present case equals one.
28.Unit of parameters: (xL, yL, Δ, a, b, lθ)μm, (TMET, τθ) second, v0 μm/s, and D0 μm2/s.
29. M. H. Jacobs, Diffusion Processes (Springer, New York, 1967).
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We numerically investigate the escape kinetics of elliptic Janus particles from narrow two-dimensional cavities with reflecting walls. The self-propulsion velocity of the Janus particle is directed along either their major (prolate) or minor (oblate) axis. We show that the mean exit time is very sensitive to the cavity geometry, particle shape, and self-propulsion strength. The mean exit time is found to be a minimum when the self-propulsion length is equal to the cavity size. We also find the optimum mean escape time as a function of the self-propulsion velocity, translational diffusion, and particle shape. Thus, effective transport control mechanisms for Janus particles in a channel can be implemented.
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