Pressure-area relations for Langmuir monolayers

A. D. Drozdov, L. Likhterov, A. Berman

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Pressure-area relations are derived for quasi-static compression of a Langmuir monolayer in the regimes of expanded and partially compressed chains. A monolayer is treated as an ensemble of flexible chains anchored at a flat water-air interface. Formation of surface pressure is attributed to excluded-volume interactions between segments of hydrophobic tail-groups. Close-form expressions are derived for the energy of interactions. Based on this relations, strength of excluded-volume interactions is evaluated by fitting pressure-area isotherms on stearic, behenic and pentacosadiynoic acids. It is found that the dimensionless strength of excluded-volume interactions is weakly affected by chain length and its value is close to frac(1, 3).

Original languageEnglish
Pages (from-to)3374-3379
Number of pages6
JournalEuropean Polymer Journal
Issue number8
StatePublished - 1 Aug 2007


  • Excluded-volume interactions
  • Flexible chains
  • Langmuir monolayer
  • Pressure-area isotherms

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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