Multi-configurations in nematic liquid crystal films: A microrubbing approach

S. Varghese; G.P. Crawford; C.W.M. Bastiaansen; D.J. Broer; D.K.G. Boer, de

doi:10.1080/15421400590930755

Multi-configurations in nematic liquid crystal films: A microrubbing approach

S. Varghese, G.P. Crawford, C.W.M. Bastiaansen, D.J. Broer, D.K.G. Boer, de

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Abstract

We report a technique for the patterned alignment of liq. crystals on polyimide using microrubbing (m-rubbing). Homeotropic polyimide was m-rubbed with a metallic sphere 1 mm in diam. under a specified load of 150 g. We obsd. that m-rubbing induces a high pretilt planar alignment when homeotropic polyimide is used. Liq. crystal cells were constructed from two m-rubbed polyimide substrates, whose rubbing directions are oriented orthogonal to each other. At the intersection points of two m-rubbed lines, a twisted nematic configuration was obsd. In the other sections of the sample, either a splay or homeotropic configuration is realized. A pretilt of 10° was measured in the m-rubbed area. The electro-optical performances of the twisted nematic regions were also investigated.

Original language	English
Pages (from-to)	55-63
Journal	Molecular Crystals and Liquid Crystals
Volume	429
DOIs	https://doi.org/10.1080/15421400590930755
Publication status	Published - 2005

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title = "Multi-configurations in nematic liquid crystal films: A microrubbing approach",

abstract = "We report a technique for the patterned alignment of liq. crystals on polyimide using microrubbing (m-rubbing). Homeotropic polyimide was m-rubbed with a metallic sphere 1 mm in diam. under a specified load of 150 g. We obsd. that m-rubbing induces a high pretilt planar alignment when homeotropic polyimide is used. Liq. crystal cells were constructed from two m-rubbed polyimide substrates, whose rubbing directions are oriented orthogonal to each other. At the intersection points of two m-rubbed lines, a twisted nematic configuration was obsd. In the other sections of the sample, either a splay or homeotropic configuration is realized. A pretilt of 10° was measured in the m-rubbed area. The electro-optical performances of the twisted nematic regions were also investigated.",

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AU - Varghese, S.

AU - Crawford, G.P.

AU - Bastiaansen, C.W.M.

AU - Broer, D.J.

AU - Boer, de, D.K.G.

PY - 2005

Y1 - 2005

N2 - We report a technique for the patterned alignment of liq. crystals on polyimide using microrubbing (m-rubbing). Homeotropic polyimide was m-rubbed with a metallic sphere 1 mm in diam. under a specified load of 150 g. We obsd. that m-rubbing induces a high pretilt planar alignment when homeotropic polyimide is used. Liq. crystal cells were constructed from two m-rubbed polyimide substrates, whose rubbing directions are oriented orthogonal to each other. At the intersection points of two m-rubbed lines, a twisted nematic configuration was obsd. In the other sections of the sample, either a splay or homeotropic configuration is realized. A pretilt of 10° was measured in the m-rubbed area. The electro-optical performances of the twisted nematic regions were also investigated.

AB - We report a technique for the patterned alignment of liq. crystals on polyimide using microrubbing (m-rubbing). Homeotropic polyimide was m-rubbed with a metallic sphere 1 mm in diam. under a specified load of 150 g. We obsd. that m-rubbing induces a high pretilt planar alignment when homeotropic polyimide is used. Liq. crystal cells were constructed from two m-rubbed polyimide substrates, whose rubbing directions are oriented orthogonal to each other. At the intersection points of two m-rubbed lines, a twisted nematic configuration was obsd. In the other sections of the sample, either a splay or homeotropic configuration is realized. A pretilt of 10° was measured in the m-rubbed area. The electro-optical performances of the twisted nematic regions were also investigated.

U2 - 10.1080/15421400590930755

DO - 10.1080/15421400590930755

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SN - 1542-1406

VL - 429

SP - 55

EP - 63

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

ER -

Multi-configurations in nematic liquid crystal films: A microrubbing approach

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