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Charge transport by inverse micelles in non-polar media.

08:00 EDT 12th September 2017 | BioPortfolio

Summary of "Charge transport by inverse micelles in non-polar media."

Charged inverse micelles play an important role in the electrical charging and the electrodynamics of nonpolar colloidal dispersion relevant for applications such as electronic ink displays and liquid toner printing. This review examines the properties and the behavior of charged inverse micelles in microscale devices in the absence of colloidal particles. It is discussed how charge in nonpolar liquids is stabilized in inverse micelles and how conductivity depends on the inverse micelle size, water content and ionic impurities. Frequently used nonpolar surfactant systems are investigated with emphasis on Aerosol-OT (AOT) and poly-isobutylene succinimide (PIBS) in dodecane. Charge generation in the bulk by disproportionation is studied from measurements of conductivity as a function of surfactant concentration and from generation currents in quasi steady-state. When a potential difference is applied, the steady-state solution can show electric field screening or complete charge separation. Different regimes of charge transport are identified when a voltage step is applied. It is shown how the steady-state and the transient current depend on bulk generation, the properties of newly generated charged inverse micelles, insulating layers and sticking or non-sticking behavior of charged inverse micelles at interfaces. For the cases of AOT and PIBS in dodecane, the magnitude of the generation rate and the type of interaction at the interface are very different. .

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This article was published in the following journal.

Name: Journal of physics. Condensed matter : an Institute of Physics journal
ISSN: 1361-648X
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