Surface tension of electrolytes: Hydrophilic and hydrophobic ions near an interface

Details Surface tension of electrolytes: Hydrophilic and hydrophobic ions near an interface Surface tension of electrolytes: Hydrophilic and hydrophobic ions near an interface

2008-05-14

arxiv.org/abs/0805.2035v1

Physics

Condensed Matter

Soft Condensed Matter

8 figures

Scientific paper

10.1063/1.2936992

We calculate the ion distributions around an interface in fluid mixtures of highly polar and less polar fluids (water and oil) for two and three ion species. We take into account the solvation and image interactions between ions and solvent. We show that hydrophilic and hydrophobic ions tend to undergo a microphase separation at an interface, giving rise to an enlarged electric double layer. We also derive a general expression for the surface tension of electrolyte systems, which contains a negative electrostatic contribution proportional to the square root of the bulk salt density. The amplitude of this square-root term is small for hydrophilic ion pairs, but is much increased for hydrophilic and hydrophobic ion pairs. For three ion species including hydrophilic and hydrophobic ions, we calculate the ion distributions to explain those obtained by x-ray reflectivity measurements.

Affiliated with

Also associated with

No associations

Rating

Surface tension of electrolytes: Hydrophilic and hydrophobic ions near an interface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Surface tension of electrolytes: Hydrophilic and hydrophobic ions near an interface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface tension of electrolytes: Hydrophilic and hydrophobic ions near an interface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-55742