Ellipsoidal particles at fluid interfaces

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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$^o$, 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.
10 pages, submitted to EPJE (Special Issue Soft Matter Conference Aachen'07)

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/164608

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0801.2851
 http://arxiv.org/abs/0801.2851
 Eur. Phys. J. E 26, 151-160 (2008)
 doi:10.1140/epje/i2007-10314-1

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arXiv