Journal
SOFT MATTER
Volume 9, Issue 33, Pages 7928-7933Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3sm50900a
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Funding
- ARRS program [P1-0099]
- Portuguese Science and Technology Foundation [SFRH/BD/63574/2009, PTDC/CTM-POL/1484/2012, PTDC/FIS/110132/2009, PEst-C/CTM/LA0025/2011, LA 25-2011-2012]
- NSF [DMR 1104850]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1104850] Funding Source: National Science Foundation
- Fundação para a Ciência e a Tecnologia [SFRH/BD/63574/2009, PTDC/FIS/110132/2009] Funding Source: FCT
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Liquid crystals in confined geometries exhibit numerous complex structures often including topological defects that are controlled by the nematic elasticity, chirality and surface anchoring. In this work, we study the structures of cholesteric droplets pierced by cellulose fibres with planar anchoring at droplet and fibre surfaces. By varying the temperature we demonstrate the role of twisting power and droplet diameter on the equilibrium structures. The observed structures are complemented by detailed numerical simulations of possible director fields decorated by defects. Three distinct structures, a bipolar and two ring configurations, are identified experimentally and numerically. Designing cholesteric liquid crystal microdroplets on thin long threads opens new routes to produce fibre waveguides decorated with complex microresonators.
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