Motile bacteria in a critical fluid mixture.

We studied the swimming of Escherichia coli bacteria in the vicinity of the critical point in a solution of the nonionic surfactant C_{12}E_{5} in buffer solution. In phase-contrast microscopy, each swimming cell produces a transient trail behind itself lasting several seconds. Comparing quantitative image analysis with simulations show that these trails are due to local phase reorganization triggered by differential adsorption. This contrasts with similar trails seen in bacteria swimming in liquid crystals, which are due to shear effects. We show how our trails are controlled, and use them to probe the structure and dynamics of critical fluctuations in the fluid medium.

• Publication year

  2018

• Venue

  Physical Review E

• Publication date

  2018-01-07

• Fields of study

  Medicine, Physics, Chemistry

• Identifiers
  DOI 10.1103/PhysRevE.97.062604arXiv 1801.02215PMID 30011513
• 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.

• and s

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