Observation of Saturn-Ring Defects around Solid Microspheres in Nematic Liquid Crystals

Details Observation of Saturn-Ring Defects around Solid Microspheres in Nematic Liquid Crystals Observation of Saturn-Ring Defects around Solid Microspheres in Nematic Liquid Crystals

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvl..85.4719g&link_type=abstract

Physical Review Letters, Volume 85, Issue 22, November 27, 2000, pp.4719-4722

Mathematics

Logic

59

Scientific paper

We report an experimental system based on rigid, monodisperse, microparticles with tunable surface properties for the study of topological defects that form about dispersed solid phases in anisotropic media. We clearly observe equatorial Saturn-ring defects to form a distance \(0.09+/-0.01\)R from the surface of isolated microspheres (with strong homeotropic anchoring) dispersed in nematic phases. These defects, some of which are observed to be stable for up to a month, are similar in size to past theoretical predictions (with strong homeotropic anchoring) and can be reversibly expanded in an electric field.

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