publication . Other literature type . Preprint . Article . 2008

Hydrodynamic Attraction of Swimming Microorganisms by Surfaces

Allison P. Berke; Linda Turner; Howard C. Berg; Eric Lauga;
  • Published: 17 Jul 2008
  • Publisher: American Physical Society (APS)
Abstract
Cells swimming in confined environments are attracted by surfaces. We measure the steady-state distribution of smooth-swimming bacteria (Escherichia coli) between two glass plates. In agreement with earlier studies, we find a strong increase of the cell concentration at the boundaries. We demonstrate theoretically that hydrodynamic interactions of the swimming cells with solid surfaces lead to their re-orientation in the direction parallel to the surfaces, as well as their attraction by the closest wall. A model is derived for the steady-state distribution of swimming cells, which compares favorably with our measurements. We exploit our data to estimate the flag...
Subjects
Medical Subject Headings: human activities
free text keywords: Condensed Matter - Soft Condensed Matter, Physics - Biological Physics, Physics - Fluid Dynamics, General Physics and Astronomy, Solid surface, Atomic physics, Physics, Nanotechnology, Chemical physics, Microorganism, Attraction, Squirmer
Funded by
NSF| Life at the Interface: Biolocomotion Near Boundaries
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0624830
  • Funding stream: Directorate for Engineering | Division of Chemical, Bioengineering, Environmental, and Transport Systems
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publication . Other literature type . Preprint . Article . 2008

Hydrodynamic Attraction of Swimming Microorganisms by Surfaces

Allison P. Berke; Linda Turner; Howard C. Berg; Eric Lauga;