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Particle-stabilised foams: an interfacial study

Stocco, Antonio; Drenckhan, Wiebke; Rio, Emanuelle; Langevin, Dominique; Binks, Bernard P.


Antonio Stocco

Wiebke Drenckhan

Emanuelle Rio

Dominique Langevin


In an attempt to elucidate the remarkable stability of foams generated from dispersions of partially hydrophobic nanoparticles (fumed silica), we present investigations into the static and dilational properties of the gas-liquid interfaces of such dispersions. By relating the dynamic surface tension gamma(t) and the dilational elasticity E measured using an oscillating bubble device, we confirm that the Gibbs stability criterion E > gamma/2 against foam coarsening is fulfilled. We complement these studies using ellipsometry and Brewster angle microscopy, which provide evidence for a pronounced adsorption barrier for the particles and a network-like structure in the interface at sufficiently high concentrations. We observe this structure also in freely suspended films drawn from the same particle dispersions.


Stocco, A., Drenckhan, W., Rio, E., Langevin, D., & Binks, B. P. (2009). Particle-stabilised foams: an interfacial study. Soft matter, 5(11), 2215-2222.

Journal Article Type Article
Acceptance Date Mar 19, 2009
Online Publication Date Apr 24, 2009
Publication Date Jul 14, 2009
Print ISSN 1744-683X
Electronic ISSN 1744-6848
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 5
Issue 11
Pages 2215-2222
Keywords General Chemistry; Condensed Matter Physics
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