Regensburg 2004 – scientific programme

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DY: Dynamik und Statistische Physik

DY 51: Polymers and Colloids

DY 51.3: Talk

Friday, March 12, 2004, 11:15–11:30, H3

Nematic-mediated interaction between colloidal particles with opposing anchoring: a Derjaguin approach — •Maria Inmaculada Rodriguez-Ponce¹, Jose Manuel Romero-Enrique², and Luis F Rull³ — ¹Lehrstuhl 5 fuer theoretische Physik, Physik Department, Technische Universitaet Muenchen (Germany) — ²Imperial College of Science, Technology and Medecine. Department of Mathematics (London, U. K.) — ³Departamento de Fisica Atomica, Molecular y Nuclear. Area de Fisica Teorica, Universidad de Sevilla (Sp ain)

We will consider the effect of a nematic solvent on the effective interction between two colloidal particles which favour homeotropic and planar anchoring, respectively. Neglecting the effect of the nematic director field distorsion at large distances, the short-distance effective interaction between colloidal particles can be related to the hybrid slit pore solvation force via Derjaguin approximation. We present the rich phenomenology that the hybrid slitpresents as the anchoring potential strengths are tuned. This study has been performed in the framework of the Density Functional Theory.