Flow of a surfactant across a thin liquid film wetting a solid substrate

J. B. Peng*, S. X. He, Pulak Dutta, John B Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Transfer of a monolayer (valinomycin) between two Langmuir troughs via an interconnecting glass "bridge" has been observed when there is a difference between the monolayer pressures in the two troughs. Assuming that the transfer occurs over the surface of the thin film of water that wets the "bridge," the transfer rate can be used to estimate the thickness of the liquid film. The thickness thus determined may be used to determine the retarded van der Waals (Hamaker) constant associated with the interaction of the film with the underlying substrate.

Original languageEnglish (US)
Pages (from-to)7421-7423
Number of pages3
JournalPhysical Review A
Issue number12
StatePublished - Jan 1 1989

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Atomic and Molecular Physics, and Optics


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