Behavior of colloidal particles at an air/nematic liquid crystal interface

Details Behavior of colloidal particles at an air/nematic liquid crystal interface Behavior of colloidal particles at an air/nematic liquid crystal interface

2010-07-04

arxiv.org/abs/1007.0585v1

Physics

Condensed Matter

Soft Condensed Matter

4 page, 4 figure

Scientific paper

We examine the behavior of spherical silica particles trapped at an air-nematic liquid crystal interface. When a strong normal anchoring is imposed, the beads spontaneously form various structures depending on their area density and the nematic thickness. Using optical tweezers, we determine the pair potential and explain the formation of these patterns. The energy profile is discussed in terms of capillary and elastic interactions. Finally, we detail the mechanisms that control the formation of an hexagonal lattice and analyze the role of gravity for curved interfaces.

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