Orientational transition in a nematic liquid crystal at a patterned surface

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Orientational transition in a nematic liquid crystal at a patterned surface

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dc.contributor.author Atherton, T. J. en_GB
dc.contributor.author Sambles, J. Roy en_GB
dc.contributor.department University of Exeter en_GB
dc.date.accessioned 2008-06-04T11:11:55Z en_GB
dc.date.accessioned 2011-01-25T11:54:00Z en_US
dc.date.accessioned 2013-03-20T13:25:06Z
dc.date.issued 2006 en_GB
dc.description.abstract We consider a semi-infinite nematic in contact with a periodic patterned surface with alternate planar and homeotropic stripes. Extending the work of Barbero et al., we find the free energy (assuming K1=K3) for the situations where the easy direction on the planar stripe is either perpendicular or parallel to the length of the stripes. We find the bulk free energy difference between the structures to be proportional to √ K2/K1 and so we consider the possibility of a spontaneous transition between the two states if the azimuthal anchoring energy is sufficiently weak and K1≠K2. We compute the critical azimuthal anchoring energy for such a transition in terms of the relative width of the stripes and the period of the pattern and find it to be ~10−6 J m−2, comparable to experimental values. en_GB
dc.identifier.citation 74 (2), article 022701 en_GB
dc.identifier.doi 10.1103/PhysRevE.74.022701 en_GB
dc.identifier.uri http://hdl.handle.net/10036/29468 en_GB
dc.language.iso en en_GB
dc.publisher American Physical Society en_GB
dc.relation.url http://dx.doi.org/10.1103/PhysRevE.74.022701 en_GB
dc.relation.url http://link.aps.org/abstract/PRE/v74/e022701 en_GB
dc.subject nematic liquid crystals en_GB
dc.subject liquid crystal phase transformations en_GB
dc.subject molecular orientation en_GB
dc.subject free energy en_GB
dc.subject surface phenomena en_GB
dc.title Orientational transition in a nematic liquid crystal at a patterned surface en_GB
dc.type Article en_GB
dc.date.available 2008-06-04T11:11:55Z en_GB
dc.date.available 2011-01-25T11:54:00Z en_US
dc.date.available 2013-03-20T13:25:06Z
dc.identifier.issn 1539-3755 en_GB
dc.identifier.issn 1550-2376 en_GB
dc.description T. J. Atherton and J. Roy Sambles, Physical Review E, Vol. 74, article 022701 (2006) "Copyright © 2006 by the American Physical Society." en_GB
dc.identifier.journal Physical Review E en_GB


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