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Journal Article

Self-motile colloidal particles: From directed propulsion to Random walk

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Golestanian,  R.       
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Howse, J. R., Jones, R. A. L., Ryan, A. J., Gough, T., Vafabakhsh, R., & Golestanian, R. (2007). Self-motile colloidal particles: From directed propulsion to Random walk. Physical Review Letters, 99(4): 048102. doi:10.1103/PhysRevLett.99.048102.


Cite as: https://hdl.handle.net/21.11116/0000-0001-A6EB-B
Abstract
The motion of an artificial microscale swimmer that uses a chemical reaction catalyzed on its own surface to achieve autonomous propulsion is fully characterized experimentally. It is shown that at short times it has a substantial component of directed motion, with a velocity that depends on the concentration of fuel molecules. At longer times, the motion reverts to a random walk with a substantially enhanced diffusion coefficient. Our results suggest strategies for designing artificial chemotactic systems. © 2007 The American Physical Society.