Ions at the Air-Water Interface: An End to a Hundred-Year-Old Mystery?
Ions at the Air-Water Interface: An End to a Hundred-Year-Old Mystery?
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DOI：
10.1103/physrevlett.103.257802
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发表时间：
2009-12-18
影响因子：
8.6
通讯作者：
Diehl, Alexandre
中科院分区：
文献类型：
--
作者：
Levin, Yan;dos Santos, Alexandre P.;Diehl, Alexandre
气溶胶表面高活性卤素离子的存在对大气化学具有重大影响。然而，无论是模拟、实验，还是现有的理论，都无法对电解质 - 空气界面提供完全一致的描述。在这篇快报中，提出了一种新理论，该理论使我们能够明确计算离子密度分布、表面张力以及溶液 - 空气界面的静电势差。将该理论的预测与实验进行了比较，发现二者非常吻合。该理论还为物理化学中最古老的谜题之一——霍夫迈斯特效应，提供了新的见解。
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 Letter 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.