期刊
CHEMICAL PHYSICS LETTERS
卷 397, 期 1-3, 页码 46-50出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2004.08.048
关键词
-
In 1937, Jones and Ray observed a minimum in the surface tension of electrolyte solutions at similar to1 mM concentrations. According to the Gibbs adsorption equation, a decreasing surface tension corresponds to an enhanced ion concentration at the interface, which is contrary to textbook descriptions based on Onsanger-Samaras theory. The 'Jones-Ray Effect' has since been essentially dismissed as an artifact of the indirect experimental method used, and remains today as a curiosity. Here, we present direct experimental confirmation of the enhanced anion concentration around 1 mM of alkali iodide solutions using resonance enhanced femtosecond second harmonic generation, and the extraction of a large and negative value for the surface excess free energy (-6.2+/-0.2 kcal/mol). (C) 2004 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据