Reverse Micelles Enable Strong Electrostatic Interactions of Colloidal Particles in Nonpolar Solvents

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dc.creatorHsu, Ming F.
dc.creatorDufresne, Eric R.
dc.creatorWeitz, David A.
dc.date2004-12-08
dc.date2005-02-07
dc.date.accessioned2026-07-07T03:02:33Z
dc.date.available2026-07-07T03:02:33Z
dc.descriptionWhile the important role of electrostatic interactions in aqueous colloidal suspensions is widely known and reasonably well-understood, the relevance of charge in nonpolar suspensions remains mysterious. We demonstrate that particles can have surprisingly strong electrostatic interactions in low dielectric constant environments when ions are solubilized by reverse micelles. A simple thermodynamic model, relating the structure of the micelles to the equilibrium ionic strength, is in good agreement with both conductivity and interaction measurements. Since dissociated ions are solubilized by reverse micelles, the entropic incentive to charge a particle surface is qualitatively changed, and surface entropy plays a important role.
dc.description4 pages, three figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0412185
dc.identifierhttp://arxiv.org/abs/cond-mat/0412185
dc.identifier(in extended form) Langmuir v21 pp4881-4887 (2005)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25435
dc.subjectSoft Condensed Matter
dc.titleReverse Micelles Enable Strong Electrostatic Interactions of Colloidal Particles in Nonpolar Solvents
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