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Size dependence of the propulsion velocity for catalytic Janus-sphere swimmers.

Abstract:

The propulsion velocity of active colloids that asymmetrically catalyze a chemical reaction is probed experimentally as a function of their sizes. It is found that over the experimentally accessible range, the velocity decays as a function of size, with a rate that is compatible with an inverse size dependence. A diffusion-reaction model for the concentrations of the fuel and waste molecules that takes into account a two-step process for the asymmetric catalytic activity on the surface of the...

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Publisher copy:
10.1103/physreve.85.020401

Authors


Golestanian, R More by this author
Journal:
Physical review. E, Statistical, nonlinear, and soft matter physics
Volume:
85
Issue:
2 Pt 1
Pages:
020401
Publication date:
2012-02-05
DOI:
EISSN:
1550-2376
ISSN:
1539-3755
URN:
uuid:8d5927eb-73f9-42c3-be3b-2adf90f084cd
Source identifiers:
354039
Local pid:
pubs:354039

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