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Geodesic defect anchoring on nematic shells

Mirantsev, Leonid V. and Sonnet, Andre and Virga, Epitanio G. (2012) Geodesic defect anchoring on nematic shells. Physical Review E, 86 (2). ISSN 1539-3755

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Nematic shells are colloidal particles coated with nematic liquid crystal molecules, which may freely glide and rotate on the colloid's surface while keeping their long axis on the local tangent plane. Molecular dynamics simulations on a nanoscopic spherical shell indicate that under appropriate adhesion conditions for the molecules on the equator, the equilibrium nematic texture exhibits at each pole a pair of +1/2 defects so close to one another to be treated as one +1 defect. Spirals connect the polar defects, though the continuum limit of the interaction potential would not feature any elastic anisotropy. A molecular averaging justifies an anchoring defect energy that feels the geodesics emanating from the defect. All our observations are explained by such a geodesic anchoring, which vanishes on flat manifolds.

Item type: Article
ID code: 42192
Keywords: nematic shells, molecular dynamics simulations, nematic liquid crystal molecules, Physics, Statistical and Nonlinear Physics, Statistics and Probability, Condensed Matter Physics
Subjects: Science > Physics
Department: Faculty of Science > Mathematics and Statistics
Depositing user: Pure Administrator
Date Deposited: 23 Nov 2012 20:13
Last modified: 24 Jul 2015 11:36
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