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Article Dans Une Revue Journal of Colloid and Interface Science Année : 2012

Foam films in the presence of functionalized gold nanoparticles

Résumé

Dry aqueous foams made of anionic surfactant (SDS) and spherical gold nanoparticles are studied by small angle X-ray scattering and by optical techniques. To obtain stable foams, the surfactant concentration is well above the critical micelle concentration. The specular reflectivity signal obtained on a very thin film (thickness 20 nm) shows that functionalized nanoparticles (17 nm typical size) are trapped within the film in the form of a single monolayer. In order to isolate the film behavior, investigations are made on a single film confined in a tube. The film thinning according to the ratio of functionalized nanoparticle and SDS micelles (1:1, 1:10, 1:100) is mainly governed by the structural arrangement of SOS micelles. In thick films, nanoparticles tend to form aggregates that disappear during drainage. In particular self-organization of nanoparticles (with different surface charge) inside the film is not detected.

Dates et versions

hal-00746935 , version 1 (30-10-2012)

Identifiants

Citer

Janine Emile, Martinus H. V. Werts, Franck Artzner, Federico Casanova, Olivier Emile, et al.. Foam films in the presence of functionalized gold nanoparticles. Journal of Colloid and Interface Science, 2012, 383, pp.124-129. ⟨10.1016/j.jcis.2012.06.039⟩. ⟨hal-00746935⟩
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