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Interactions on the interface between two liquid crystal materials
ID Geršak, Rok (Author), ID Čopar, Simon (Author)

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Abstract
In liquid crystal applications, boundary conditions are essential to ensuring suitable bulk molecular orientation and a deterministic response to external fields. Be it confinement to a droplet or a shell, a glass plate, or an interface with air or another liquid, proper surface alignment must be ensured—mechanically by rubbing, by chemical treatment that adds a layer of aligning molecules, by using photoalignment or even by leaving the surface untreated, using the intrinsic properties of the substrate itself. The anchoring can be classified as unidirectional (perpendicular homeotropic, or at oblique angles), or degenerate (planar or pre-tilted). However, if both substances at the interface are anisotropic, more diverse behaviour is expected. Here, we present a numerical simulation of a nematic droplet in a nematic host, and investigate behaviour of the director field and defects at the interface for different interfacial couplings. Finally, we compare the simulations to experimental images of discotic droplets in a calamitic nematic host.

Language:English
Keywords:liquid crystals, surface anchoring, nematic droplets, numerical simulations, anisotropic interface, Landau-de Gennes
Work type:Article (dk_c)
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Year:2020
Publication status in journal:Published
Article version:Publisher's version of article
Number of pages:10 str.
Numbering:Vol. 10, iss. 5, art. 393
PID:20.500.12556/RUL-133683 This link opens in a new window
UDC:538.9
ISSN on article:2073-4352
DOI:10.3390/cryst10050393 This link opens in a new window
COBISS.SI-ID:15849731 This link opens in a new window
Publication date in RUL:09.12.2021
Views:308
Downloads:97
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Record is a part of a journal

Title:Crystals
Shortened title:Crystals
Publisher:MDPI
ISSN:2073-4352
COBISS.SI-ID:36677893 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:14.05.2020

Secondary language

Language:Slovenian
Keywords:tekoči kristali, površinsko sidranje, nematske kapljice, numerične simulacije

Projects

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:P1-0099
Name:Fizika mehkih snovi, površin in nanostruktur

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:J1-9149
Name:Orientacijske interakcije v posplošenem Thomsonovem problemu: dipolna stabilizacija sferičnih nanostruktur

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