Hydrodynamic attraction of swimming microorganisms by surfaces.

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 reorientation 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 flagellar propulsive force in swimming E. coli.

• Publication year

  2008

• Venue

  Physical Review Letters

• Publication date

  2008-06-18

• Fields of study

  Biology, Medicine, Physics, Chemistry

• Identifiers
  DOI 10.1103/PhysRevLett.101.038102arXiv 0806.2898PMID 18764299
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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