Unique effect of the electric field on a new liquid crystalline lactic acid derivative

0448971 - FZÚ 2016 RIV GB eng J - Článek v odborném periodiku
Novotná, Vladimíra - Glogarová, Milada - Kašpar, Miroslav - Hamplová, Věra - Lejček, Lubor - Pociecha, D.
Unique effect of the electric field on a new liquid crystalline lactic acid derivative.
Soft Matter. Roč. 11, č. 23 (2015), s. 4649-4657. ISSN 1744-683X. E-ISSN 1744-6848
Grant CEP: GA ČR GA13-14133S; GA ČR(CZ) GA15-02986S
Grant ostatní: AV ČR(CZ) M100101211
Institucionální podpora: RVO:68378271
Klíčová slova: liquid crystals * TGBA phase * Frederiks transition
Kód oboru RIV: JJ - Ostatní materiály
Impakt faktor: 3.798, rok: 2015

A new chiral lactic acid derivative is presented, exhibiting a frustrated liquid crystalline phase, namely the orthogonal twist grain boundary TGBA phase in a broad temperature interval. Unique effect is observed and found that the applied electric field reversibly transforms the planar TGBA texture to the homeotropic one, homogeneously dark in crossed polarizers. The unusual behavior of the TGBA phase under the electric field can be explained by the specific packing of molecules within the smectic layers, resulting in relatively high layer compressibility, which lowers the energy of structural defects and thus facilitates the structure transformation.
Trvalý link: http://hdl.handle.net/11104/0250571