Measurement of contact angle relaxation during the deposition of Langmuir-Blodgett films of cadmium stearate and valinomycin

J. B. Peng*, S. He, P. Dutta, J. B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We studied the contact angle relaxation during the Langmuir-Blodgett deposition of cadmium stearate and valinomycin films. For cadmium, we found that the relaxation time of the receding contact angle depends strongly on the deposition type; the static value that the receding angle relaxes to depends on the concentration of Cd2+ ions in the subphase. For 4.0 × 10-2 M Cd2+ subphase, the deposition begins and remains Y-type. However, at a lower concentration of 2.5 × 10-3 M the deposition changes from Y- to X-type. Prior to this transition, the static receding angles for the two different Cd2+ concentrations are different but the relaxation times are about the same. After the transition, the relaxation process is more than 20 times faster. For valinomycin, the deposition is predominantly Z-type.

Original languageEnglish (US)
Pages (from-to)351-357
Number of pages7
JournalThin Solid Films
Volume202
Issue number2
DOIs
StatePublished - Jul 30 1991

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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