Comparing Photoactuation of an Azobenzene-Doped Nematic Liquid Crystal Polymer through Its Activation Mechanism: Trans-Cis-Trans Reorientation and Photoisomerization

被引：9

作者：

Yun, Jung-Hoon ^{[1
,3
]}

Li, Chenzhe ^{[1
]}

Kim, Seongseop ^{[1
]}

Cho, Maenghyo ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, Dept Mech Engn, Bldg 301 Room 1524, Seoul 08826, South Korea

[2] Seoul Natl Univ, Inst Adv Machines & Design, Dept Mech & Aerosp Engn, Seoul 08826, South Korea

[3] LG Display, 10 Magokjungang,10 Ro, Seoul 07796, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

LIGHT; VALIDATION; ELASTOMERS; ACTUATORS; BEHAVIOR; SPRINGS; FILMS;

D O I：

10.1021/acs.jpcc.7b12184

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We compare the actuation speeds of the azobenzene-doped nematic liquid crystal polymer (azo-LCP) by examining its activation mechanisms: photoisomerization and trans-cis-trans reorientation (TCTR) (also known as Weigert effect). Both experiments and modeling are carried out in this study to compare the speed of bending and contraction acting on azo-LCP. We identify that the TCTR-based photobending of azo-LCP generated less than half the photostrain in a unit cell than that in the photoisomerization case but involves a larger azo-LCP thickness in triggering photodeformation. Because photodeformation occurs in a deeper region than that in the photoisomerization case, the TCTR-based photobending of azo-LCP exhibits a faster bending speed than the photoisomerization-based photobending of azo-LCP, even though less strain is generated in the TCTR case.

引用

页码：6310 / 6317

页数：8

共 5 条

[1] Multiscale modeling and its validation of the trans-cis-trans reorientation-based photodeformation in azobenzene-doped liquid crystal polymer
Yun, Jung-Hoon
Li, Chenzhe
Chung, Hayoung
Choi, Joonmyung
Cho, Maenghyo
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2017, 128 : 36 - 49
[2] trans-cis and trans-cis-trans Microstructure Evolution of Azobenzene Liquid-Crystal Polymer Networks
Wang, Hongbo
Lee, Kyung Min
White, Timothy J.
Oates, William S.
MACROMOLECULAR THEORY AND SIMULATIONS, 2012, 21 (05) : 285 - 301
[3] Trans-cis-trans photoisomerization as an all-optical switching in azo-dye doped polymer waveguide - art. no. 682818
Mohajerani, E.
Heydari, E.
LIGHT-EMITTING DIODE MATERIALS AND DEVICES II, 2008, 6828 : 82818 - 82818
[4] Kinetics of thermal cis-trans isomerization in a phototropic azobenzene-based single-component liquid crystal in its nematic and isotropic phases
Miniewicz, Andrzej
Orlikowska, Hanna
Sobolewska, Anna
Bartkiewicz, Stanislaw
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2018, 20 (04) : 2904 - 2913
[5] Effect of trans-cis photoisomerization on phase equilibria and phase transition of liquid-crystalline azobenzene chromophore and its blends with reactive mesogenic diacrylate
Kim, Namil
Li, Quan
Kyu, Thein
PHYSICAL REVIEW E, 2011, 83 (03):

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