Controllable LC anchoring on poly{1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt} command surface

Stefan Petrov; Nguyen Hong Minh Chau; Vera Marinova; Ching Cherng Sun; Ken Yuh Hsu; Shiuan Huei Lin

doi:10.1016/j.polymer.2023.125841

Controllable LC anchoring on poly{1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt} command surface

Stefan Petrov, Nguyen Hong Minh Chau, Vera Marinova, Ching Cherng Sun, Ken Yuh Hsu, Shiuan Huei Lin

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Herein we present a comprehensive evaluation of the side-chain azobenzene-containing polymer as photoalignment command surface for nematic Liquid Crystal (LC) device assembly. Decomposition of birefringence creation dynamics was used to elucidate the relation between the photoinduced illumination intensity, pre-tilt angle and anchoring strength at the LC/photopolymer interface. The electro-optical parameters such as threshold voltage, response time and the phase retardation of assembled LC cell were characterized for actinic intensities up to 100 mW/cm². In azimuthal plane, controlling the illumination intensity improved the anchoring strength by two orders of magnitude and allows to manipulate the LC director at will. Direct impact of the enhanced zenithal anchoring on LC devices decay time during Fréedericksz transition was also demonstrated.

Original language	English
Article number	125841
Journal	Polymer
Volume	272
DOIs	https://doi.org/10.1016/j.polymer.2023.125841
State	Published - 17 Apr 2023

Keywords

Anchoring strength
Birefringence
Liquid crystals
Photoalignment
Polymers
Pre-tilt angle

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10.1016/j.polymer.2023.125841

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@article{21b985d7c222410cbd7902e246a01bb6,

title = "Controllable LC anchoring on poly{1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt} command surface",

abstract = "Herein we present a comprehensive evaluation of the side-chain azobenzene-containing polymer as photoalignment command surface for nematic Liquid Crystal (LC) device assembly. Decomposition of birefringence creation dynamics was used to elucidate the relation between the photoinduced illumination intensity, pre-tilt angle and anchoring strength at the LC/photopolymer interface. The electro-optical parameters such as threshold voltage, response time and the phase retardation of assembled LC cell were characterized for actinic intensities up to 100 mW/cm2. In azimuthal plane, controlling the illumination intensity improved the anchoring strength by two orders of magnitude and allows to manipulate the LC director at will. Direct impact of the enhanced zenithal anchoring on LC devices decay time during Fr{\'e}edericksz transition was also demonstrated.",

keywords = "Anchoring strength, Birefringence, Liquid crystals, Photoalignment, Polymers, Pre-tilt angle",

author = "Stefan Petrov and Chau, {Nguyen Hong Minh} and Vera Marinova and Sun, {Ching Cherng} and Hsu, {Ken Yuh} and Lin, {Shiuan Huei}",

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year = "2023",

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day = "17",

doi = "10.1016/j.polymer.2023.125841",

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TY - JOUR

T1 - Controllable LC anchoring on poly{1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt} command surface

AU - Petrov, Stefan

AU - Chau, Nguyen Hong Minh

AU - Marinova, Vera

AU - Sun, Ching Cherng

AU - Hsu, Ken Yuh

AU - Lin, Shiuan Huei

PY - 2023/4/17

Y1 - 2023/4/17

N2 - Herein we present a comprehensive evaluation of the side-chain azobenzene-containing polymer as photoalignment command surface for nematic Liquid Crystal (LC) device assembly. Decomposition of birefringence creation dynamics was used to elucidate the relation between the photoinduced illumination intensity, pre-tilt angle and anchoring strength at the LC/photopolymer interface. The electro-optical parameters such as threshold voltage, response time and the phase retardation of assembled LC cell were characterized for actinic intensities up to 100 mW/cm2. In azimuthal plane, controlling the illumination intensity improved the anchoring strength by two orders of magnitude and allows to manipulate the LC director at will. Direct impact of the enhanced zenithal anchoring on LC devices decay time during Fréedericksz transition was also demonstrated.

AB - Herein we present a comprehensive evaluation of the side-chain azobenzene-containing polymer as photoalignment command surface for nematic Liquid Crystal (LC) device assembly. Decomposition of birefringence creation dynamics was used to elucidate the relation between the photoinduced illumination intensity, pre-tilt angle and anchoring strength at the LC/photopolymer interface. The electro-optical parameters such as threshold voltage, response time and the phase retardation of assembled LC cell were characterized for actinic intensities up to 100 mW/cm2. In azimuthal plane, controlling the illumination intensity improved the anchoring strength by two orders of magnitude and allows to manipulate the LC director at will. Direct impact of the enhanced zenithal anchoring on LC devices decay time during Fréedericksz transition was also demonstrated.

KW - Anchoring strength

KW - Birefringence

KW - Liquid crystals

KW - Photoalignment

KW - Polymers

KW - Pre-tilt angle

UR - http://www.scopus.com/inward/record.url?scp=85150196644&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2023.125841

DO - 10.1016/j.polymer.2023.125841

M3 - 期刊論文

AN - SCOPUS:85150196644

SN - 0032-3861

VL - 272

JO - Polymer

JF - Polymer

M1 - 125841

ER -

Controllable LC anchoring on poly{1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt} command surface

Abstract

Keywords

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