Electric-Field Induced Capillary Interaction of Charged Particles at a Polar Interface

Lionel Foret (1) , Aloïs Würger (1)

1 CPMOH - Centre de physique moléculaire optique et hertzienne

We study the electric-field induced capillary interaction of charged particles at a polar interface. The algebraic tails of the electrostatic pressure of each charge results in a deformation of the interface $u\sim \rho ^{-4}$. The resulting capillary interaction\ is repulsive and varies as $\rho ^{-6}$ with the particle distance. As a consequence, electric-field induced capillary forces cannot be at the origin of the secondary minimum observed recently for charged PMMA particles at on oil-water interface.

Mots clés: Capillary interaction; Screening; Charge effects; Colloid; Interface

Domaines: Autre [cond-mat.other]; Matière Molle [cond-mat.soft]

Lionel Foret, Aloïs Würger. Electric-Field Induced Capillary Interaction of Charged Particles at a Polar Interface. Physical Review Letters, 2004, 92 (5), pp.058302 (1-4). ⟨10.1103/PhysRevLett.92.058302⟩. ⟨hal-00000796⟩