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Nematic liquid crystals on sinusoidal channels: the zigzag instability

Opened Access Nematic liquid crystals on sinusoidal channels: the zigzag instability

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Autor: Romero Enrique, José Manuel
Silvestre, Nuno M.
Telo Da Gama, Margarida Maria
Departamento: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Fecha: 2017
Publicado en: Journal of Physics: Condensed Matter, 29 (1), 1-10.
Tipo de documento: Artículo
Resumen: Substrates which are chemically or topographically patterned induce a variety of liquid crystal textures. The response of the liquid crystal to competing surface orientations, typical of patterned substrates, is determined by the anisotropy of the elastic constants and the interplay of the relevant lengths scales, such as the correlation length and the surface geometrical parameters. Transitions between different textures, usually with different symmetries, may occur under a wide range of conditions. We use the Landau–de Gennes free energy to investigate the texture of nematics in sinusoidal channels with parallel anchoring bounded by nematic-air interfaces that favour perpendicular (hometropic) anchoring. In micron size channels 5CB was observed to exhibit a non-trivial texture characterized by a disclination line, within the channel, which is broken into a zigzag pattern. Our calculations reveal that when the elastic anisotropy of the nematic does not favour twist distortions the ...
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Cita: Romero Enrique, J.M., Silvestre, N.M. y Telo Da Gama, M.M. (2017). Nematic liquid crystals on sinusoidal channels: the zigzag instability. Journal of Physics: Condensed Matter, 29 (1), 1-10.
Tamaño: 1.113Mb
Formato: PDF

URI: http://hdl.handle.net/11441/64638

DOI: 10.1088/0953-8984/29/1/014004

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