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Ferroelectrics Volume 495, 2016 - Issue 1: Proceedings of the Fifteenth International Conference on Ferroelectric Liquid Crystals (FLC-2015)
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Original Articles

Flexoelectric polarization in cyanoresorcinol and oxadiazole bent core nematic liquid crystals

S. P. SreenilayamaDepartment of Electronic and Electrical Engineering, Trinity College Dublin, the University of Dublin, Dublin, Ireland
,
Yu. P. PanarinaDepartment of Electronic and Electrical Engineering, Trinity College Dublin, the University of Dublin, Dublin, Ireland;School of Electrical and Electronic Engineering, Dublin Institute of Technology, IrelandCorrespondence[email protected]
,
J. K. VijaDepartment of Electronic and Electrical Engineering, Trinity College Dublin, the University of Dublin, Dublin, Ireland
,
S.I. TorgovaP.N. Lebedev Physical Institute of Russian Academy of Sciences, Moscow, Russia
,
A. LehmannInstitute of Chemistry Organic Chemistry, Martin-Luther-University Halle, Germany
&
C. TschierskeInstitute of Chemistry Organic Chemistry, Martin-Luther-University Halle, Germany
Pages 28-34 | Received 28 Jun 2015, Accepted 25 Nov 2015, Published online: 16 Mar 2016
 
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ABSTRACT

The flexoelectric polarization (Pf) and the sum of flexoelectric coefficients |e1+e3|of 4-cyanoresorcinol bisbenzoate and 1, 2, 4-oxadiazole bent-core nematic liquid crystals have been measured using the technique based on the pyroelectric effect. The hybrid aligned nematic cells are fabricated for measuring the pyroelectric response over the entire range of the nematic phase. It is found that the magnitude of Pf and (|e1+e3|) for the studied bent-core LCs are higher than for the calamitics liquid crystals and these are dependent on the transverse dipole moment of the molecule and the range of nematic phase.

Funding

Our work was supported by 13/US/I2866 from the Science Foundation of Ireland as part of the US–Ireland Research and Development Partnership program jointly administered with the United States National Science Foundation under grant number NSF-DMR-1410649.

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