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Self-motile colloidal particles: from directed propulsion to random walk.

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.
Publication status:
Published

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Authors


Vafabakhsh, R More by this author
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Journal:
Physical review letters
Volume:
99
Issue:
4
Pages:
048102
Publication date:
2007-07-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:fc5a9f84-93a2-4962-82cb-11dc0f4c1941
Source identifiers:
155799
Local pid:
pubs:155799
Language:
English
Keywords:

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