NDLI: Capillary Flows of Nematic Liquid Crystal

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Capillary Flows of Nematic Liquid Crystal

Content Provider	MDPI
Author	Shmeliova, Dina V. Pasechnik, Sergey V. Kharlamov, Semen S. Zakharov, Alexandre V. Pozhidaev, Eugeny P. Barbashov, Vadim A. Tkachenko, Timofey P.
Copyright Year	2020
Description	In this paper we report the new experimental results on the rise of a liquid crystal in flat capillaries with inner photosensitive surfaces. The capillaries with different surface orientations were prepared by the use of the photo-alignment technique. Such a surface treatment makes it possible to eliminate the noncontrollable influence of a nanorelief on the wetting process, which takes place in the rubbing treatment technique previously used in similar experiments. The dynamics of the capillary rise of a nematic liquid crystal 5CB (4-cyano-4′-pentylbiphenyl) in vertical plane capillaries with photo-aligned substrates were studied for the first time. It was found that the stationary value of a contact angle weakly depends on the direction of a planar surface orientation relative to the direction of a capillary rise. It has been shown that the application of strong electric fields resulted in a decreasing of the contact angle. The results, obtained for the nematic liquid crystal, are compared with the results of an investigation of the capillary flow in a shock-free ferroelectric smectic phase.
Starting Page	1029
e-ISSN	20734352
DOI	10.3390/cryst10111029
Journal	Crystals
Issue Number	11
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-11-11
Access Restriction	Open
Subject Keyword	Crystals Atomic, Molecular and Chemical Physics Capillary Flow Photo-alignment Electric Field Anisotropic Shear Viscosities Contact Angle Liquid Crystal
Content Type	Text
Resource Type	Article

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