WÜRGER, Alois

doi:10.1140/epje/e2006-00002-y

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WÜRGER, Alois
Centre de physique moléculaire optique et hertzienne [CPMOH]

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European Physical Journal E: Soft matter and biological physics. 2006-01-17, vol. 19, p. 5

EDP Sciences: EPJ

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We study the electrostatic properties of charged particles trapped at an interface in a water-in-oil microemulsion. The electrostatic potential and the counterion distribution in the water droplet are given in terms of the ratio of the Debye screening length ⁻¹ and the droplet radius R. In the limit R→∞ we recover the well-known results for a flat interface. Finite-size corrections are obtained in terms of the small parameter 1/R. Part of the counterions spread along the interface and form a charged layer of one Debye length thickness. In particular, there is a uniform surface charge contribution. We derive explicit expressions for the electric field, the mobile charge density, and the charge-induced pressure on the interface.< Réduire

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Screened Electrostatics of Charged Particles on a Water Droplet

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