Issue 48, 2007

The effect of double-chain surfactants on armored bubbles: a surfactant-controlled route to colloidosomes

Abstract

We find that the gas phases of air bubbles covered with anionic or cationic polystyrene latex particles dissolve on exposure to cationic and catanionic surfactants. The particles on the bubble interface are released as singlets or aggregates when the surfactant has a single hydrophobic chain, while porous colloidal capsules (colloidosomes) with the same aqueous phase inside as out are obtained when the surfactant has two hydrophobic chains. The formation of colloidosomes from the particle-covered bubbles does not appear to depend significantly on the charge of the particles, which makes it unlikely that bilayers of surfactant are stabilizing the colloidosome. While the exact mechanism of formation remains an open question, our method is a simple one-step process for obtaining colloidosomes from particle-covered bubbles.

Graphical abstract: The effect of double-chain surfactants on armored bubbles: a surfactant-controlled route to colloidosomes

Supplementary files

Article information

Article type
Paper
Submitted
08 Aug 2007
Accepted
24 Oct 2007
First published
15 Nov 2007

Phys. Chem. Chem. Phys., 2007,9, 6476-6481

The effect of double-chain surfactants on armored bubbles: a surfactant-controlled route to colloidosomes

A. B. Subramaniam, D. Gregory, J. Petkov and H. A. Stone, Phys. Chem. Chem. Phys., 2007, 9, 6476 DOI: 10.1039/B712172E

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