Enhanced flexoelectric anisotropy of nematic liquid crystal with hydrogen-bonded dimer

Jimin Park; Jongyoon Kim; Jahyeon Koo; Kwang-Un Jeong; Ji-Hoon Lee

doi:10.1117/12.2545919

25 February 2020 Enhanced flexoelectric anisotropy of nematic liquid crystal with hydrogen-bonded dimer

Jimin Park, Jongyoon Kim, Jahyeon Koo, Kwang-Un Jeong, Ji-Hoon Lee

Author Affiliations +

Proceedings Volume 11303, Emerging Liquid Crystal Technologies XV; 1130312 (2020) https://doi.org/10.1117/12.2545919
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

We synthesized 4-[7(4’-Cyanobiphenyl-4-yl)hexyloxy]bezoic acid (CBO7OBA) utilized as liquid crystal (LC) dopant. The CBO7OBA molecules form dimers with hydrogen bonding between molecules. We enhanced significantly the flexoelectric anisotropy of nematic LC mixture only with the small amount of doping of CBO7OBA. The flexoelectric anisotropy of mixtures of T04 (JNC) and ZSM50089 (JNC) doped with CBO7OBA molecules was enhanced 1.42 and 2.67 times compared with pure nematic LC, respectively.Moreover, we investigate the dependence of flexoelectric current on the bending effect of the virtual device. The flexoelectric current improved by about 2.9 times compared with pure LC due to the increase of the dipole moment and the bent-core structure of the dimer.

Citation Download Citation

Jimin Park, Jongyoon Kim, Jahyeon Koo, Kwang-Un Jeong, and Ji-Hoon Lee "Enhanced flexoelectric anisotropy of nematic liquid crystal with hydrogen-bonded dimer", Proc. SPIE 11303, Emerging Liquid Crystal Technologies XV, 1130312 (25 February 2020); https://doi.org/10.1117/12.2545919

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