Statistical mechanics of surface tension and Tolman length of dipolar fluids

T. V. Bykov, X. C. Zeng

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The Tolman length (δ) characterizes the first-order correction to the surface tension (σ) due to curvature of the interface. Statistical mechanical expressions for σ and δ were derived previously by Blokhuis and Bedeaux [Physica A 1992, 184, 42] for nonpolar fluids. Here Blokhuis and Bedeaux's approach is extended to dipolar fluids. Two approximations to the pair correlation function are employed, and their effects on σ and δ are examined. The dependence of σ and δ on temperature and dipole moment is also explored. It is found that σ increases with the dipole moment while |δ| decreases as the dipole moment is increased. The sign of δ is, however, negative.

Original languageEnglish (US)
Pages (from-to)11586-11594
Number of pages9
JournalJournal of Physical Chemistry B
Volume105
Issue number47
DOIs
StatePublished - Nov 29 2001

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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