Statistical mechanics of multilayer sorption: Surface tension

Anthony S. Wexler, Cari S. Dutcher, Simon L. Clegg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Mathematical models of surface tension as a function of solute concentration are needed for predicting the behavior of surface processes relevant to the environment, biology and industry. Current aqueous surface tension-concentration models capture either solutions of electrolytes or those of organics, but a single set of equations has not yet been found that represents both in one unified framework. In prior work we developed an accurate model of the activityconcentration relationship over the full range of compositions by extending the BET and GAB isotherms models to multiple sorbed monolayers (Dutcher et al. JPC 2011, 2012, 2013). Here we employ similar statistical mechanical tools to develop a simple equation for the surface tension-composition relationship that differs remarkably from prior formulations in that it (1) works equally well for organic and electrolyte solutes and their mixtures, (2) does not contain any factors representing the relative amounts of solute in the bulk or at the surface-this is captured by surface-bulk equilibria in the model, and (3) is accurate over the entire RH range.

Original languageEnglish (US)
Title of host publicationAIP Conference Proceedings
Pages476-479
Number of pages4
Volume1527
DOIs
StatePublished - 2013
Event19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013 - Fort Collins, CO, United States
Duration: Jun 23 2013Jun 28 2013

Other

Other19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013
CountryUnited States
CityFort Collins, CO
Period6/23/136/28/13

Keywords

  • Adsorption
  • Isotherms
  • Surface Tension

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Wexler, A. S., Dutcher, C. S., & Clegg, S. L. (2013). Statistical mechanics of multilayer sorption: Surface tension. In AIP Conference Proceedings (Vol. 1527, pp. 476-479) https://doi.org/10.1063/1.4803308