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

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.

[1]  Dissolution arrest and stability of particle-covered bubbles. , 2007, Physical review letters.

[2]  Vinothan N. Manoharan,et al.  Colloidal spheres confined by liquid droplets: Geometry, physics, and physical chemistry , 2006 .

[3]  L Mahadevan,et al.  Mechanics of interfacial composite materials. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[4]  Cecile O. Mejean,et al.  Microstructure, morphology, and lifetime of armored bubbles exposed to surfactants. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[5]  O. Cayre,et al.  Fabrication of novel colloidosome microcapsules with gelled aqueous cores , 2004 .

[6]  Vesselin N Paunov,et al.  Foam superstabilization by polymer microrods. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[7]  O. Velev,et al.  Fabrication of "hairy" colloidosomes with shells of polymeric microrods. , 2004, Journal of the American Chemical Society.

[8]  R Atkin,et al.  Mechanism of cationic surfactant adsorption at the solid-aqueous interface. , 2003, Advances in colloid and interface science.

[9]  A. R. Bausch,et al.  Colloidosomes: Selectively Permeable Capsules Composed of Colloidal Particles , 2002, Science.

[10]  B. Binks.  Particles as surfactants—similarities and differences , 2002 .

[11]  R. Zielinski,et al.  Effect of Temperature on Micelle Formation in Aqueous NaBr Solutions of Octyltrimethylammonium Bromide. , 1989, Journal of colloid and interface science.

[12]  V. N. Paunov,et al.  Compression and Structure of Monolayers of Charged Latex Particles at Air/Water and Octane/Water Interfaces , 2000 .

[13]  T. Lubensky,et al.  Surfactant-mediated two-dimensional crystallization of colloidal crystals , 1999, Science.

[14]  A. M. Carmona-Ribeiro,et al.  Interactions between bilayer membranes and latex , 1999 .

[15]  A. M. Carmona-Ribeiro,et al.  Bilayer Wetting on Polymer Surfaces , 1996 .

[16]  Kunio Furusawa,et al.  Assembly of Latex Particles by Using Emulsion Droplets as Templates. 1. Microstructured Hollow Spheres , 1996 .

[17]  S. A. Pisarev,et al.  Self-assembly in double-tailed surfactants in dilute aqueous solutions , 1995 .

[18]  A. M. Carmona-Ribeiro,et al.  Synthetic bilayer adsorption onto polystyrene microspheres , 1992 .

[19]  J. Zasadzinski,et al.  Spontaneous vesicle formation in aqueous mixtures of single-tailed surfactants. , 1989, Science.

[20]  S. Ikeda,et al.  The adsorption of cetyltrimethylammonium bromide on aqueous surfaces of sodium bromide solutions , 1987 .

[21]  P. Lianos,et al.  Fluorescence probe study of the effect of concentration on the state of aggregation of dodecylalkyldimethylammonium bromides and dialkyldimethylammonium chlorides in aqueous solution , 1983 .

[22]  P. Pieranski,et al.  Two-Dimensional Interfacial Colloidal Crystals , 1980 .

[23]  K. J. Mysels,et al.  The surface tension of sodium dodecylsulfate solutions and the phase separation model of micelle formation , 1966 .

[24]  Klevens Hb.  Critical micelle concentrations as determined by refraction. , 1948 .

[25]  W. Ramsden,et al.  Separation of solids in the surface-layers of solutions and ‘suspensions’ (observations on surface-membranes, bubbles, emulsions, and mechanical coagulation).—Preliminary account , 1904, Proceedings of the Royal Society of London.