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

Publication date: November 2018Source: Colloid and Interface Science Communications, Volume 27Author(s): Yuki Uematsu, Kengo Chida, Hiroki MatsubaraAbstractThe 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.Graphical Abstract
Source: Colloids and Interface Science Communications - Category: Nanotechnology Source Type: research