Intentionally Added Ionic Surfactants Induce Jones-Ray Effect at Air-Water Interface

Yuki Uematsu, Kengo Chida, Hiroki Matsubara

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The Jones-Ray effect is an anomalous minimum in the surface tension of aqueous electrolytes at millimolar salt concentrations. We experimentally demonstrated that intentionally added ionic surfactants induce the Jones-Ray effect. The one-dimensional Poisson-Boltzmann theory, including the effect of surfactant adsorption and salt depletion, excellently agrees with the obtained experimental data. All the parameters of the ion-specific surface affinities used in the theory are consistent with previous experiments. These results strongly suggest that the Jones-Ray effect observed so far has been induced by the inevitable contamination of the air-water interfaces.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
JournalColloids and Interface Science Communications
Publication statusPublished - Nov 2018

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry
  • Materials Chemistry


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