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Influence of Adsorption Layer Thickness on the Damping of Longitudinal Surface Waves
Alexey G Bykov1, Olga Yu Milyaeva1, Anastasiya R Rafikova1
1Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504St. Petersburg, Russia.
Abstract:
The properties of adsorption layers of fibrinogen, silk fibroin, and silk fibroin fibrils at the solution/air interface were studied by the oscillating barrier method, ellipsometry and atomic force microscopy in a Langmuir trough. The results on the dynamic surface elasticity depended on the distance between the barriers due to a strong damping of longitudinal surface waves in systems with a thick and relatively dense distal region of the surface layer. This effect has to be taken into account in the course of measurements of the dynamic surface elasticity by the oscillating barrier method in solutions of long amphiphilic macromolecules.
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