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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kostikov D. A., Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие : Nematic structures under conical anchoring at various director tilt angles specified by polymethacrylate compositions
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [20-42-240007]
Место публикации : Polymers. - 2021. - Vol. 13, Is. 17. - Ст.2993. - ISSN 2073-4360(eISSN), DOI 10.3390/polym13172993
Примечания : Cited References: 49. - Mikhail N. Krakhalev and Oxana O. Prishchepa acknowledge financial support from Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (No 20-42-240007)
Предметные рубрики: LIQUID-CRYSTAL
PRETILT ANGLE
ALIGNMENT LAYERS
SURFACE
INTERFACE
Аннотация: Dependence of the director tilt angle of nematic liquid crystal (LC) under conical anchoring from the two-component polymer mixture composition has been studied. We varied the ratio of poly(isobutyl methacrylate) (PiBMA), which specifies a conical anchoring for the nematic liquid crystal LN-396, and poly(methylmethacrylate) (PMMA) assigning a tangential alignment for the same nematic. An oblique incidence light technique to determine a tilt angle has been used. It has been shown that the tilt angle increases from 0∘ to 47.7∘ when PiBMA:PMMA ratio changes in the range 30:70 to 100:0. The specific optical textures viewed under the polarizing microscope and proper orientational structures have been considered for various compositions of the polymer films. An electric field action on the formed orientational structures has been investigated. The obtained results are promising for the application in various electro-optical LC devices with a conical anchoring in which the director tilt angle is a crucial parameter: a controlled diffraction gratings, an electrically operated achromatic rotators of linear light polarization, etc.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kostikov D. A., Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие : LC layers under planar-conical anchoring with various tilt angles specified by polymethacrylate compositions
Коллективы : International Liquid Crystal Conference
Место публикации : Abstracts of 28th International Liquid Crystal Conference (ILCC 2022). - 2022. - Ст.PC.094
Примечания : Cited References: 2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kostikov D. A., Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие : Electrically induced structural transformations of a chiral nematic under tangential-conical boundary conditions
Колич.характеристики :10 с
Место публикации : Molecules. - 2023. - Vol. 28, Is. 23. - Ст.7842. - ISSN 14203049 (eISSN), DOI 10.3390/molecules28237842
Примечания : Cited References: 30
Аннотация: In this study, structural transformations induced by an electric field in the chiral nematic under tangential-conical boundary conditions have been considered. The composition influence of the orienting polymer films on the director tilt angles, the formation of orientational structures in the LC layer, as well as the electro-optical response and relaxation processes have been studied. It has been shown that the poly(tert-butyl methacrylate) concentration change in the orienting polymer mixture allows for smoothly controlling the director tilt angle without fixing its azimuthal orientation rigidly.
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