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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, Sarabjot; Panov, V. P. ; Greco, C. et al.
In: Applied Physics Letters, Vol. 105, No. 22, 223505, 2014, p. 1-4.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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, pp. 1-4. 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), 1-4. Article 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;105(22):1-4. 223505. Epub 2014 Dec 2. doi: 10.1063/1.4903242

Author

Kaur, Sarabjot ; Panov, V. P. ; Greco, C. et al. / Flexoelectricity in an oxadiazole bent-core nematic liquid crystal. In: Applied Physics Letters. 2014 ; Vol. 105, No. 22. pp. 1-4.

Bibtex

@article{ab2efccddb33403f81f8b59dc57aa53f,
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, |e 1 − e 3|, of an oxadiazole bent-core liquid crystal by measuring the critical voltage for the formation of flexodomains together with their wave number. The coefficient |e 1 − e 3| 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 e 1 and e 3, 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 = "Sarabjot Kaur and Panov, {V. P.} and C. Greco and A. Ferrarini and Verena G{\"o}rtz and Goodby, {John W.} and Gleeson, {Helen F.}",
note = "Copyright 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 105 (22), 2014 and may be found at http://scitation.aip.org/content/aip/journal/apl/105/22/10.1063/1.4903242",
year = "2014",
doi = "10.1063/1.4903242",
language = "English",
volume = "105",
pages = "1--4",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Inc.",
number = "22",

}

RIS

TY - JOUR

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

AU - Kaur, Sarabjot

AU - Panov, V. P.

AU - Greco, C.

AU - Ferrarini, A.

AU - Görtz, Verena

AU - Goodby, John W.

AU - Gleeson, Helen F.

N1 - Copyright 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 105 (22), 2014 and may be found at http://scitation.aip.org/content/aip/journal/apl/105/22/10.1063/1.4903242

PY - 2014

Y1 - 2014

N2 - We have determined experimentally the magnitude of the difference in the splay and bend flexoelectric coefficients, |e 1 − e 3|, of an oxadiazole bent-core liquid crystal by measuring the critical voltage for the formation of flexodomains together with their wave number. The coefficient |e 1 − e 3| 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 e 1 and e 3, 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, |e 1 − e 3|, of an oxadiazole bent-core liquid crystal by measuring the critical voltage for the formation of flexodomains together with their wave number. The coefficient |e 1 − e 3| 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 e 1 and e 3, 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.

U2 - 10.1063/1.4903242

DO - 10.1063/1.4903242

M3 - Journal article

VL - 105

SP - 1

EP - 4

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 22

M1 - 223505

ER -