Effective pair interactions between colloidal particles at a nematic-isotropic interface
arXiv:cond-mat/0501573 · doi:10.1209/epl/i2004-10455-3
Abstract
The Landau-de Gennes free energy is used to study theoretically the interaction of parallel cylindrical colloidal particles trapped at a nematic-isotropic interface. We find that the effective interaction potential is non-monotonic. The corresponding force-distance curves exhibit jumps and hysteresis upon approach/separation due to the creation/annihilation of topological defects. Minimization results suggest a simple empirical pair potential for the effective colloid-colloid interaction at the interface. We propose that the interface-mediated interaction can play an important role in self-organization and clustering of colloidal particles at such interfaces.
8 pages. 7 figures
References in corpus (5)
- Ordered droplet structures at the liquid crystal surface and elastic-capillary colloidal interactions
- Electric-field induced capillary interaction of charged particles at a polar interface
- Capillary bridging and long-range attractive forces in a mean-field approach
- Colloidal interactions in two dimensional nematics
- Interaction of colloids with a nematic-isotropic interface