Ions at the air-water interface: An end to one hundred year old mystery?

Details Ions at the air-water interface: An end to one hundred year old mystery? Ions at the air-water interface: An end to one hundred year old mystery?

2009-09-11

arxiv.org/abs/0909.2222v2

Phys. Rev. Lett. 103, 257802 (2009)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.103.257802

Availability of highly reactive halogen ions at the surface of aerosols has tremendous implications for the atmospheric chemistry. Yet neither simulations, experiments, nor existing theories are able to provide a fully consistent description of the electrolyte-air interface. In this paper a new theory is proposed which allows us to explicitly calculate the ionic density profiles, the surface tension, and the electrostatic potential difference across the solution-air interface. Predictions of the theory are compared to experiments and are found to be in excellent agreement. The theory also sheds new light on one of the oldest puzzles of physical chemistry -- the Hofmeister effect.

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