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° , 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.
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Lehle, H., Noruzifar, E. & Oettel, M. Ellipsoidal particles at fluid interfaces. Eur. Phys. J. E 26, 151–160 (2008). https://doi.org/10.1140/epje/i2007-10314-1
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DOI: https://doi.org/10.1140/epje/i2007-10314-1