Light-induced Phase Transition of Lyotropic Liquid Crystals and Motion Behavior of Micron Objects via Photochemical Azobenzene Molecules

DOI

10.2991/icmsa-15.2015.11How to use a DOI?

Keywords

Lyotropic liquid crystal, Phase transition, Azobenzene, Motion behavior.

Abstract

Ternary lyotropic liquid crystal (LLC), was prepared by mixing tetradecyltrimethylamonium bromide (MTAB), water and azobenzene (Az). The phase transition of the LLC was induced from LC phase to isotropic (I) one upon Ar+ laser, which was owing to the trans-cis-trans phoisomerizaion cycle of Az during the irradiation. After that, the LC phase gradually recovered from I phase to nematic (N) phase when being exposed to dark condition. It was also suggested that the recovery time from I to N was different with the Az structures, temperature and ratio of MTAB/Az in the ternary system. Then, the effect of light irradiation on the motion behavior of micron objects dispersed in the ternary LLC film was studied. It was found that the micron objects which dispersed in the irradiated area moved toward the center of the irradiated area, while the micron objects which dispersed around the irradiated area moved away from the irradiated area.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Su Ma
AU  - Yutaka Kuwahara
AU  - Tomonari Ogata
AU  - Sunnam Kim
AU  - Seiji Kurihara
PY  - 2014/06
DA  - 2014/06
TI  - Light-induced Phase Transition of Lyotropic Liquid Crystals and Motion Behavior of Micron Objects via Photochemical Azobenzene Molecules
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 57
EP  - 62
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.11
DO  - 10.2991/icmsa-15.2015.11
ID  - Ma2014/06
ER  -