Surmounting Barriers: The Benefit of Hydrodynamic Interactions

Details Surmounting Barriers: The Benefit of Hydrodynamic Interactions Surmounting Barriers: The Benefit of Hydrodynamic Interactions

2005-10-06

arxiv.org/abs/cond-mat/0510135v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures, for movies see www.uni-stuttgart.de/colloids/go/caterpillar

Scientific paper

10.1209/epl/i2006-10017-9

We experimentally and theoretically investigate the collective behavior of three colloidal particles that are driven by a constant force along a toroidal trap. Due to hydrodynamic interactions, a characteristic limit cycle is observed. When we additionally apply a periodic sawtooth potential, we find a novel caterpillar-like motional sequence that is dominated by hydrodynamic interactions and promotes the surmounting of potential barriers by the particles.

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