Rectification of swimming bacteria and self-driven particle systems by arrays of asymmetric barriers.
Phys Rev Lett
; 101(1): 018102, 2008 Jul 04.
Article
in En
| MEDLINE
| ID: mdl-18764155
ABSTRACT
We show that the recent experimental observation of the rectification of swimming bacteria in a system with an array of asymmetric barriers occurs due to the ballistic component of the bacteria trajectories introduced by the bacterial "motor." Each bacterium selects a random direction for motion and then moves in this direction for a fixed period of time before randomly changing its orientation and moving in a new direction. In the limit where the bacteria undergo only Brownian motion on the size scale of the barriers, rectification does not occur. We examine the effects of steric interactions between the bacteria and observe a clogging effect upon increasing the bacteria density.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacterial Physiological Phenomena
/
Locomotion
/
Models, Biological
Language:
En
Journal:
Phys Rev Lett
Year:
2008
Document type:
Article
Affiliation country:
Estados Unidos