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Flexoelectricity in an oxadiazole bent-core nematic liquid crystal

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Flexoelectricity in an oxadiazole bent-core nematic liquid crystal. / Kaur, S.; Panov, V. P.; Greco, C.; Ferrarini, A.; Görtz, V.; Goodby, J. W.; Gleeson, H. F.

In: Applied Physics Letters, Vol. 105, No. 22, 223505, 01.12.2014.

Research output: Contribution to journalArticle

Harvard

Kaur, S, Panov, VP, Greco, C, Ferrarini, A, Görtz, V, Goodby, JW & Gleeson, HF 2014, 'Flexoelectricity in an oxadiazole bent-core nematic liquid crystal', Applied Physics Letters, vol. 105, no. 22, 223505. https://doi.org/10.1063/1.4903242

APA

Kaur, S., Panov, V. P., Greco, C., Ferrarini, A., Görtz, V., Goodby, J. W., & Gleeson, H. F. (2014). Flexoelectricity in an oxadiazole bent-core nematic liquid crystal. Applied Physics Letters, 105(22), [223505]. https://doi.org/10.1063/1.4903242

Vancouver

Kaur S, Panov VP, Greco C, Ferrarini A, Görtz V, Goodby JW et al. Flexoelectricity in an oxadiazole bent-core nematic liquid crystal. Applied Physics Letters. 2014 Dec 1;105(22). 223505. https://doi.org/10.1063/1.4903242

Author

Kaur, S. ; Panov, V. P. ; Greco, C. ; Ferrarini, A. ; Görtz, V. ; Goodby, J. W. ; Gleeson, H. F. / Flexoelectricity in an oxadiazole bent-core nematic liquid crystal. In: Applied Physics Letters. 2014 ; Vol. 105, No. 22.

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@article{0191d45b2a1240d4bb243728bbfc785e,
title = "Flexoelectricity in an oxadiazole bent-core nematic liquid crystal",
abstract = "We have determined experimentally the magnitude of the difference in the splay and bend flexoelectric coefficients, |e1 - e3|, of an oxadiazole bent-core liquid crystal by measuring the critical voltage for the formation of flexodomains together with their wave number. The coefficient |e1 - e3| is found to be a factor of 2-3 times higher than in most conventional calamitic nematic liquid crystals, varying from 8 pCm-1 to 20 pCm-1 across the ∼60 K - wide nematic regime. We have also calculated the individual flexoelectric coefficients e1 and e3, with the dipolar and quadrupolar contributions of the bent-core liquid crystal by combining density functional theory calculations with a molecular field approach and atomistic modelling. Interestingly, the magnitude of the bend flexoelectric coefficient is found to be rather small, in contrast to common expectations for bent-core molecules. The calculations are in excellent agreement with the experimental values, offering an insight into how molecular parameters contribute to the flexoelectric coefficients and illustrating a huge potential for the prediction of flexoelectric behaviour in bent-core liquid crystals.",
author = "S. Kaur and Panov, {V. P.} and C. Greco and A. Ferrarini and V. G{\"o}rtz and Goodby, {J. W.} and Gleeson, {H. F.}",
year = "2014",
month = "12",
day = "1",
doi = "10.1063/1.4903242",
language = "English",
volume = "105",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "22",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Flexoelectricity in an oxadiazole bent-core nematic liquid crystal

AU - Kaur, S.

AU - Panov, V. P.

AU - Greco, C.

AU - Ferrarini, A.

AU - Görtz, V.

AU - Goodby, J. W.

AU - Gleeson, H. F.

PY - 2014/12/1

Y1 - 2014/12/1

N2 - We have determined experimentally the magnitude of the difference in the splay and bend flexoelectric coefficients, |e1 - e3|, of an oxadiazole bent-core liquid crystal by measuring the critical voltage for the formation of flexodomains together with their wave number. The coefficient |e1 - e3| is found to be a factor of 2-3 times higher than in most conventional calamitic nematic liquid crystals, varying from 8 pCm-1 to 20 pCm-1 across the ∼60 K - wide nematic regime. We have also calculated the individual flexoelectric coefficients e1 and e3, with the dipolar and quadrupolar contributions of the bent-core liquid crystal by combining density functional theory calculations with a molecular field approach and atomistic modelling. Interestingly, the magnitude of the bend flexoelectric coefficient is found to be rather small, in contrast to common expectations for bent-core molecules. The calculations are in excellent agreement with the experimental values, offering an insight into how molecular parameters contribute to the flexoelectric coefficients and illustrating a huge potential for the prediction of flexoelectric behaviour in bent-core liquid crystals.

AB - We have determined experimentally the magnitude of the difference in the splay and bend flexoelectric coefficients, |e1 - e3|, of an oxadiazole bent-core liquid crystal by measuring the critical voltage for the formation of flexodomains together with their wave number. The coefficient |e1 - e3| is found to be a factor of 2-3 times higher than in most conventional calamitic nematic liquid crystals, varying from 8 pCm-1 to 20 pCm-1 across the ∼60 K - wide nematic regime. We have also calculated the individual flexoelectric coefficients e1 and e3, with the dipolar and quadrupolar contributions of the bent-core liquid crystal by combining density functional theory calculations with a molecular field approach and atomistic modelling. Interestingly, the magnitude of the bend flexoelectric coefficient is found to be rather small, in contrast to common expectations for bent-core molecules. The calculations are in excellent agreement with the experimental values, offering an insight into how molecular parameters contribute to the flexoelectric coefficients and illustrating a huge potential for the prediction of flexoelectric behaviour in bent-core liquid crystals.

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U2 - 10.1063/1.4903242

DO - 10.1063/1.4903242

M3 - Article

VL - 105

JO - Applied Physics Letters

T2 - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 22

M1 - 223505

ER -