The smectogenity as a crucial factor of broadening of the selective light reflection peak in cholesteric photopolymerizable mixtures

0565666 - FZÚ 2023 RIV GB eng J - Článek v odborném periodiku
Muraveva, V. - Kozmík, V. - Kohout, M. - Manko, A. - Piryazev, A. - Ivanov, D. - Abramchuk, S. - Cigl, Martin - Bobrovsky, A.
The smectogenity as a crucial factor of broadening of the selective light reflection peak in cholesteric photopolymerizable mixtures.
Liquid Crystals. Roč. 49, č. 11 (2022), s. 1459-1465. ISSN 0267-8292. E-ISSN 1366-5855
Grant CEP: GA ČR(CZ) GC20-22615J
Institucionální podpora: RVO:68378271
Klíčová slova: smectogenity * cholesteric mesophase * gradient of the helix pitch * broadening selective light reflection band * UV-polymerisation * broadband polariser film * acrylates
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.2, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1080/02678292.2022.2041745

Cholesteric liquid crystals reflecting circularly polarised light are promising materials for creating flexible and compact polarisers. One of the issues of these systems is the narrow width of the photonic stop band. The range of selective light reflection can be increased by creating a gradient of the cholesteric pitch in the process of photopolymerisation of reactive cholesteric mixtures. The possibility of broadening the peak of selective light reflection during UV polymerisation of nematogenic diacrylate mixed with chiral monoacrylates was studied. The monoacrylates used had a different number of aromatic rings. A broadening of the peak of selective light reflection was observed during the photopolymerisation of mixtures containing a chiral monomer with three benzene rings. While before irradiation the width of the selective reflection peak was about 100 nm, after irradiation it was broadened to about 300 nm.
Trvalý link: https://hdl.handle.net/11104/0337178