Phase transitions of soluble surfactants at a liquid-vapor interface

M. S. Tomassone, A. Couzis, C. Maldarelli, J. R. Banavar, J. Koplik

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Although medium chain length insoluble amphiphiles are well-known to form gaseous and liquid expanded phases on an air/water interface, the situation for the soluble case is controversial. We perform molecular dynamics simulations of model surfactant molecules dissolved in a bulk liquid solvent in coexistence with its vapor. Our results indicate a transition in both soluble and insoluble surfactants: a plateau in surface tension versus surface coverage, whose instantaneous configurations display two-phase coexistence, along with correlation functions indicating a transition from gaseous to liquidlike behavior.

Original languageEnglish (US)
Pages (from-to)6037-6040
Number of pages4
JournalLangmuir
Volume17
Issue number20
DOIs
StatePublished - Oct 2 2001

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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