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Flexoelectric behavior of bimesogenic liquid crystals in the nematic phase-observation of a new self-assembly pattern at the twist-bend nematic and the nematic interface

Balachandran, R.; Panov, V. P.; Panarin, Y. P.; Vij, J. K.; Tamba, M. G.; Mehl, G. H.; Song, J. K.; Mehl, Georg; Balachandran, Reshma; Panarin, Yuri; Panov, Vitaly; Song, Jang Kun; Vij, Jagdish

Authors

R. Balachandran

V. P. Panov

Y. P. Panarin

J. K. Vij

M. G. Tamba

J. K. Song

Reshma Balachandran

Yuri Panarin

Vitaly Panov

Jang Kun Song

Jagdish Vij



Abstract

Flexoelectric properties - the effective flexoelectric coefficient and flexoelectric polarization - are investigated for a bimesogenic liquid crystal CBC11CB with a twist bend nematic phase (Ntb). Results show that the effective flexoelectric coefficient is at least two times higher than that for bimesogens that do not exhibit the Ntb phase. The flexoelectric polarization for the Ntb phase is also two times greater than that in the nematic phase. In a temperature gradient cell, we observe surprisingly a new phenomenon, in the bimesogens CBC7CB and CBC9CB and their mixtures with 5CB, of periodic self-assembly in the N phase close to the N-Ntb phase transition temperature. This phenomenon is reminiscent of the self-deformation and spontaneous chirality that appear in the system.

Journal Article Type Article
Publication Date Oct 14, 2014
Journal Journal of materials chemistry C
Print ISSN 2050-7526
Electronic ISSN 2050-7534
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 2
Issue 38
Pages 8179-8184
Institution Citation Balachandran, R., Panov, V. P., Panarin, Y. P., Vij, J. K., Tamba, M. G., Mehl, G. H., & Song, J. K. (2014). Flexoelectric behavior of bimesogenic liquid crystals in the nematic phase-observation of a new self-assembly pattern at the twist-bend nematic and the nematic interface. Journal of materials chemistry. publ. by The Royal Society of Chemistry. C, Materials for optical and electronic devices /, 2(38), 8179-8184. doi:10.1039/c4tc01043d
DOI https://doi.org/10.1039/c4tc01043d
Keywords Flexoelectric behaviour
Publisher URL http://pubs.rsc.org/en/content/articlelanding/2014/tc/c4tc01043d#!divAbstract
Copyright Statement © Royal Society of Chemistry 2016
Additional Information This is the accepted version of an article published in Journal of materials chemistry C, 2014, v.2 issue 38.

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Copyright Statement
© Royal Society of Chemistry 2016





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