Contact angle of lead stearate-covered water on mica during the deposition of Langmuir-Blodgett assemblies

J. B. Peng*, B. M. Abraham, Pulak Dutta, John B Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

We have measured the dynamic and static contact angles between the monolayer-covered water surface and a mica substrate during the deposition of successive monolayers of lead stearate. The substrate was suspended from a Cahn RG Electrobalance in order to measure the contact angle-dependent force during deposition of the film; both dynamic and static angles were calculated from the output of the balance. The difference between the dynamic contact angles of the film- covered subphase on clean mica and during polar deposition on a lead stearate multilayer is approximately 18°. The static contact angle on the upstroke (polar deposition, StPb/PbSt) averages 6° greater than the dynamic angle. On the other hand, there is very little difference on the downstroke (PbSt/StPb deposition) between the static and the dynamic angles. The contact angles appear to be independent of surface pressure in the range 15-24 dyn cm-1.

Original languageEnglish (US)
Pages (from-to)187-193
Number of pages7
JournalThin Solid Films
Volume134
Issue number1-3
DOIs
StatePublished - Dec 20 1985

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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