| Autor: |
Prosser AJ; Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany., Retter U, Lunkenheimer K |
| Jazyk: |
angličtina |
| Zdroj: |
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2004 Mar 30; Vol. 20 (7), pp. 2720-5. |
| DOI: |
10.1021/la035732u |
| Abstrakt: |
The dynamic surface tension data for n-dodecanoic acid in 0.005 M hydrochloric acid, for as-received as well as for surface-chemically pure solutions, show the presence of a prolonged induction period, clearly indicating that the adsorption of this nonionic surfactant is not simply diffusion-controlled. A kinetic model for the reversible formation of monolayer islands, long known in the field of electrochemistry, is shown to also apply to the adsorption of n-dodecanoic acid at the air/water interface. The rate constant increases linearly with increasing bulk concentration, while the induction time decreases exponentially. The phenomenon of nucleation at the air/water interface is consistent with the direct experimental observation of the formation of solid-like patches as the interfacial region is drastically compressed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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