20.500.12556/DKUM-91542 Multiple twisted chiral nematic structures in cylindrical confinement In this article, we theoretically and numerically study the chirality and saddle-splay elastic constant (K24) -enabled stability of multiple twist-like nematic liquid crystal (LC) structures in cylindrical confinement. We focus on the so-called radially z-twisted (RZT) and radially twisted (RT) configurations, which simultaneously exhibit twists in different spatial directions. We express the free energies of the structures in terms of dimensionless wave vectors, which characterise the structures and play the roles of order parameters. The impact of different confinement anchoring conditions is explored. A simple Landau-type analysis provides an insight into how different model parameters influence the stability of structures. We determine conditions for which the structures are stable in chiral and also nonchiral LCs. In particular, we find that the RZT structure could exhibit macroscopic chirality inversion upon varying the relevant parameters. This phenomenon could be exploited for the measurement of K24. liquid crystals chirality confinement saddle-splay elasticity double twist deformations tekoči kristali kiralnost ograjenost true false true MDPI Angleški jezik Slovenski jezik Znanstveno delo 2025-01-14 11:17:26 2025-01-14 11:31:46 2025-01-15 03:13:48 0000-00-00 00:00:00 2020 0 0 Str. 1-15 št. 7, št. članka 576 Letn. 10 Jul. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2020-06-03 2020-07-03 2020-07-04 532.783 29663747 10.3390/cryst10070576 2073-4352 Ambrozic-2020-Multiple_Twisted_Chiral_Nematic.pdf Ambrozic-2020-Multiple_Twisted_Chiral_Nematic.pdf 1 2DF99AB07740C8B1BFEDB7DDC4D3FB1E 1f97bdcbe13d5afb55c5bc883d6063d37df312f44fdd69b861c2c0ea1b14c663 8e881247-d262-11ef-b886-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187811 https://doi.org/10.3390/cryst10070576 0 96301400-d262-11ef-b886-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187812 Fakulteta za naravoslovje in matematiko 0 0 0