Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal

Studies of sessile droplets and fluid bridges of a ferroelectric nematic liquid crystal in externally applied electric fields are presented. It is found that above a threshold, the interface of the fluid with air undergoes a fingering instability or ramification, resembling to Rayleigh-type instabil...

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Autores principales: Máthé, Marcell Tibor, Farkas, Bendegúz, Péter, László, Buka, Ágnes, Jákli, Antal, Salamon, Péter
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10147939/
https://www.ncbi.nlm.nih.gov/pubmed/37117269
http://dx.doi.org/10.1038/s41598-023-34067-1
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author Máthé, Marcell Tibor
Farkas, Bendegúz
Péter, László
Buka, Ágnes
Jákli, Antal
Salamon, Péter
author_facet Máthé, Marcell Tibor
Farkas, Bendegúz
Péter, László
Buka, Ágnes
Jákli, Antal
Salamon, Péter
author_sort Máthé, Marcell Tibor
collection PubMed
description Studies of sessile droplets and fluid bridges of a ferroelectric nematic liquid crystal in externally applied electric fields are presented. It is found that above a threshold, the interface of the fluid with air undergoes a fingering instability or ramification, resembling to Rayleigh-type instability observed in charged droplets in electric fields or circular drop-type instabilities observed in ferromagnetic liquids in magnetic field. The frequency dependence of the threshold voltage was determined in various geometries. The nematic director and ferroelectric polarization direction was found to point along the tip of the fingers that appear to repel each other, indicating that the ferroelectric polarization is essentially parallel to the director. The results are interpreted in connection to the Rayleigh and circular drop-type instabilities.
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spelling pubmed-101479392023-04-30 Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal Máthé, Marcell Tibor Farkas, Bendegúz Péter, László Buka, Ágnes Jákli, Antal Salamon, Péter Sci Rep Article Studies of sessile droplets and fluid bridges of a ferroelectric nematic liquid crystal in externally applied electric fields are presented. It is found that above a threshold, the interface of the fluid with air undergoes a fingering instability or ramification, resembling to Rayleigh-type instability observed in charged droplets in electric fields or circular drop-type instabilities observed in ferromagnetic liquids in magnetic field. The frequency dependence of the threshold voltage was determined in various geometries. The nematic director and ferroelectric polarization direction was found to point along the tip of the fingers that appear to repel each other, indicating that the ferroelectric polarization is essentially parallel to the director. The results are interpreted in connection to the Rayleigh and circular drop-type instabilities. Nature Publishing Group UK 2023-04-28 /pmc/articles/PMC10147939/ /pubmed/37117269 http://dx.doi.org/10.1038/s41598-023-34067-1 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Máthé, Marcell Tibor
Farkas, Bendegúz
Péter, László
Buka, Ágnes
Jákli, Antal
Salamon, Péter
Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
title Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
title_full Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
title_fullStr Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
title_full_unstemmed Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
title_short Electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
title_sort electric field-induced interfacial instability in a ferroelectric nematic liquid crystal
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10147939/
https://www.ncbi.nlm.nih.gov/pubmed/37117269
http://dx.doi.org/10.1038/s41598-023-34067-1
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