Document Detail

Rectification of swimming bacteria and self-driven particle systems by arrays of asymmetric barriers.
MedLine Citation:
PMID:  18764155     Owner:  NLM     Status:  MEDLINE    
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.
M B Wan; C J Olson Reichhardt; Z Nussinov; C Reichhardt
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-07-03
Journal Detail:
Title:  Physical review letters     Volume:  101     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-09-03     Completed Date:  2008-09-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  018102     Citation Subset:  IM    
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
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MeSH Terms
Bacterial Physiological Phenomena*
Locomotion / physiology*
Models, Biological*

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