Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: POSTER: Colloids and Nanoparticles

CPP 9.2: Poster

Monday, March 26, 2007, 16:00–18:00, Poster B

Fluctuation-induced interaction between anisotropic colloids at fluid interface — •Ehsan Noruzifar and Martin Oettel — Institut fuer Physik, WA 331, Johannes-Gutenberg-Universitaet Mainz, 55099 Mainz, Germany

The effective interaction between anisotropic particles trapped at fluid interface necessarily contains a long-ranged part caused by capillary wave fluctuations [1]. Due to the restrictions the colloids impose on the capillary waves, the interaction is of Casimir type which can be calculated by integrating on all possible interface configuration weighted by a simple capillary wave Hamiltonian. For the specific case of ellipsoids, we consider the resulting anisotropic interaction with regard to ordering phenomena on the interface [2].

[1] H. Lehle, M. Oettel, and S. Dietrich, Eur. Phys. Lett. 75 (2006) 174

[2]J. C. Loudet, A. M. Alsayed, J. Zhang, and A. G. Yodh, Phys. Rev. Lett. 94 (2005) 018301