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

被引：19
|
作者：
Mathe, Marcell Tibor [1 ,2 ]
Farkas, Bendeguz [1 ,2 ]
Peter, Laszlo [1 ]
Buka, Agnes [1 ]
Jakli, Antal [1 ,3 ,4 ,5 ]
Salamon, Peter [1 ]
机构：
[1] Wigner Res Ctr Phys, Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary
[2] Eotvos Lorand Univ, POB 32, H-1518 Budapest, Hungary
[3] Kent State Univ, Mat Sci Grad Program & Adv Mat, Kent, OH 44242 USA
[4] Kent State Univ, Liquid Crystal Inst, Kent, OH 44242 USA
[5] Kent State Univ, Dept Phys, Kent, OH 44242 USA
来源：
SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期
基金：
美国国家科学基金会;
关键词：
LABYRINTHINE INSTABILITY;
D O I：
10.1038/s41598-023-34067-1
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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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页数：10
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