Should the Gibbs analysis be revised?

J. Laven, G. With, de

Research output: Contribution to journalArticleAcademicpeer-review

33 Citations (Scopus)
1 Downloads (Pure)

Abstract

Recently, some arguments were published that cast doubt on the validity of the Gibbs adsorption isotherm. The doubt was on whether the often visible linearly declining part in the surface tension versus logarithm of concentration plot of a surfactant solution, just before the critical micelle concentration, really represents a situation of constant adsorption. Those published arguments are partly of a conceptual nature and partly based on experimental evidence. The conceptual arguments appear to be based on a misunderstanding of the theory, while the arguments based on experimental evidence stem from an inaccurate treatment of these data. Our conclusion is that none of the relevant arguments put forward are valid. The experimental evidence, if properly treated, is in line with the Gibbs theory.
Original languageEnglish
Pages (from-to)7958-7962
Number of pages5
JournalLangmuir
Volume27
Issue number12
DOIs
Publication statusPublished - 2011

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