The entropy effect on liquid crystal orientation relative to a nanopore surface

To date, azo dyes are widely used for liquid crystal photoalignment in flat panel displays. The relation of dichroism of azo dyes with their orientation under intensive light wave field is considered. Values of a truecos2φ¯ parameter, which characterizes orientation order of both molecules and dimers, were obtained as well as energy of their orientation process. Number of cooperatively oriented dye molecules was estimated. The angles distribution functions for different dimers were derived. Dipole electrical transition moments directed on angles close to 90° to the direction of maximal polarizability of dimers were revealed.

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“…We note that approximately the same value of N is obtained from the consideration of the LC anchoring energy in nanopores …”

Section: Energy Of the Photoorientation Processsupporting

confidence: 52%

Relation between dichroism of photoalignment azo dyes and their orientation under light wave field

et al. 2018

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“…A method of deposition of a photoaligning coating into alumina oxide pores and filling them with LC material was described in [20]. Theoretical description of the LC alignment on the pores surface is presented in [21,22]. In the case of such lenses the n(θ) dependence serves as the typical lens curvature profile.…”

Section: Lc Lenses Simulationmentioning

confidence: 99%

P‐153: Liquid Crystal Microlenses in Porous Media

Belyaev

Solomatin

Smirnov

et al. 2017

Symp Digest of Tech Papers

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LC director and refractive index distribution in a micropore with different LC boundary conditions have been simulated. Splay and bend configurations were simulated in the LC pores with Franck elastic coefficients K 33 /K 11 ratio from 0.5 to 3. For different LC orientation configurations parabolic profiles of radial dependence of the refractive index are obtained with focus distance up to 80 mm that makes it possible for application in different LC devices. Keywordsliquid crystal, microlens, cylindrical pore, focus, Franck elastic modules P-153 / V. V. Belyaev 1858 • SID 2017 DIGEST ISSN 0097-966X/17/4703-1858-$1.00 © 2017 SID P-153 / V. V. Belyaev SID 2017 DIGEST • 1859

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“…Different values of the LC pretilt angle can be obtained by using organosilicon substances or photoalignment technology . A method of deposition of a photoaligning coating into alumina oxide pores and filling them with LC material was described in Kozenkov et al Theoretical description of the LC alignment on the pores surface is presented in Dadivanyan et al…”

Section: Introductionmentioning

confidence: 99%

Microlense liquid crystal devices on the base of cylindrical objects

et al. 2019

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Liquid crystal (LC) director and refractive index distribution in a cylindrical object (eg, micropore) with different LC boundary conditions have been simulated. Splay and bend configurations were simulated in the LC pores with Franck elastic coefficients K33/K11 ratio from 0.5 to 3. For different LC orientation configurations, parabolic profiles of radial dependence of the refractive index are obtained with focus distance up to 80 mm that makes it possible for application in different LC devices.

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The entropy effect on liquid crystal orientation relative to a nanopore surface

Cited by 14 publications

References 5 publications

Relation between dichroism of photoalignment azo dyes and their orientation under light wave field

Relation between dichroism of photoalignment azo dyes and their orientation under light wave field

P‐153: Liquid Crystal Microlenses in Porous Media

Microlense liquid crystal devices on the base of cylindrical objects

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