A study of kinetic molecular exchange processes in the medium frequency range by surface SHG on an oscillating bubble

Journal of Colloid and Interface Science
Jonas OrtegrenHelmuth Möhwald

Abstract

The dilatational properties of fluid surfaces and interfaces have been comprehensively investigated in recent years. For example, an improved oscillating bubble device provided experimental results that allow for critical testing of established surface models, such as the Lucassen/van den Tempel (LvdT) model. The comparison of the LvdT model with the oscillating bubble experiments demonstrates a mismatch between the model parameters. For example, near the CMC or the limit of solubility the calculated parameters of surfactant solutions become unrealistically large. The deviation can be explained by the introduction of more detailed surface models, in particular by the modification of the effective thickness of the surface layer, its internal structure and the molecular exchange processes between these structures. For the verification of such processes an experimental setup was realized which allows for an independent determination of the instantaneous adsorption state at the surface of an oscillating bubble inside a surfactant solution. The setup utilizes the Second Harmonic Generation (SHG)--effect at the air-solution interface generated by the light of a pulsed LASER. The set-up is described in detail, and the results of a fir...Continue Reading

References

Nov 20, 1998·Journal of Colloid and Interface Science·K D WantkeK Lunkenheimer
May 4, 2001·Journal of Colloid and Interface Science·Klaus-Dieter Wantke, Horst Fruhner
Nov 18, 2005·Journal of Colloid and Interface Science·H Motschmann, K Lunkenheimer

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Citations

Jan 27, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Matthias J HofmannGer J M Koper
Apr 25, 2013·Nature Communications·Wouter SempelsJan Vermant
Jul 4, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Christine L Henry, Vincent S J Craig
Apr 13, 2006·Chemical Reviews·Kenneth B Eisenthal
May 4, 2007·The Journal of Physical Chemistry. B·Yu-Ping HuangJia-Yong Yu

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