Journal
SOFT MATTER
Volume 7, Issue 4, Pages 1467-1471Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0sm00863j
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Funding
- French ANR [BLAN07-1_183526]
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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 a hexagonal lattice and analyze the role of gravity for curved interfaces.
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