title: Ellipsoidal particles at fluid interfaces.
abstract: For partially wetting, ellipsoidal colloids trapped at a fluid interface, their effective, interface-mediated interactions of capillary and fluctuation-induced type are analyzed. For contact angles different from 90( degrees ) , static interface deformations arise which lead to anisotropic capillary forces that are substantial already for micrometer-sized particles. The capillary problem is solved using an efficient perturbative treatment which allows a fast determination of the capillary interaction for all distances between and orientations of two particles. Besides static capillary forces, fluctuation-induced forces caused by thermally excited capillary waves arise at fluid interfaces. For the specific choice of a spatially fixed three-phase contact line, the asymptotic behavior of the fluctuation-induced force is determined analytically for both the close-distance and the long-distance regime and compared to numerical solutions.
authors.affiliation: Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, Stuttgart, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Lehle
authors.forename: E
authors.initials: E
authors.lastname: Noruzifar
authors.forename: M
authors.initials: M
authors.lastname: Oettel