Structural studies of different types of ferroelectric liquid crystalline substances

0377580 - FZÚ 2013 RIV CS eng J - Journal Article
Obadović, D.Ž. - Stojanović, M. - Bubnov, Alexej - Éber, N. - Cvetinov, M. - Vajda, A.
Structural studies of different types of ferroelectric liquid crystalline substances.
Journal of Research in Physics. Roč. 35, č. 1 (2011), s. 3-13. ISSN 1450-7404
R&D Projects: GA AV ČR IAA100100911; GA AV ČR(CZ) GA202/09/0047; GA ČR(CZ) GAP204/11/0723
Grant - others:RFASI(RU) 02.740.11.5166
Institutional research plan: CEZ:AV0Z10100520
Keywords : ferroelectric liquid crystals * phase transition * structure of liquid crystalline phases * molecular parameters
Subject RIV: BM - Solid Matter Physics ; Magnetism

Structural studies of ferroelectric liquid crystalline substances with different molecular structure have been reviewed. The discussion of the results deals mainly with the structure of chiral liquid crystals forming the smectic mesophase with ferroelectric order as for the last years the research on ferroelectric liquid crystals has become one of the most attractive fields due to their high potential for application in electro-optics and photonic. On basis of polarizing optical microscopy and X–ray diffraction data obtained on unoriented samples we have identified the type of the mesophases the temperature of the phase transitions and outlined the phase diagrams. An analysis of the relation between the molecular conformation and different types of the phase transitions has been performed. The layer spacing and the average intermolecular distance have been determined for all studied phases from the positions of the small and the large angle diffraction peaks, respectively.
Permanent Link: http://hdl.handle.net/11104/0209701