Isotherm and X-ray diffraction studies of mixed monolayers

M. K. Durbin, M. C. Shih, A. Malik, P. Zschack, P. Dutta*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We have studied Langmuir monolayers of saturated fatty acid-alcohol mixtures (same chain length) and acid-acid mixtures (different chain length) using isotherms and X-ray diffraction. The diffraction data confirm that the constituents are miscible, and that at zero pressure the mixed acid-alcohol monolayer areas are less than the areas of the pure components. We have determined the phase diagrams of a number of different mixtures. In any given phase, the intermolecular distances measured perpendicular to the molecules are independent of the pressure and of the constituents of the mixture. However, the location of some phase boundaries is a strong function of the composition of the mixture.

Original languageEnglish (US)
Pages (from-to)173-179
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Issue numberC
StatePublished - Sep 13 1995


  • Isotherms
  • Mixed monolayers
  • X-ray diffraction

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry


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