A new flexoelectric mode in twist-bend nematic liquid crystals
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Molecular Liquids"
DOI: 10.1016/j.molliq.2019.111707
Abstract: Abstract Mesogenic dimers in the twist-bend nematic phase exhibit much higher flexoelectric polarization than in their uniform nematic phase. In order to theoretically investigate this data, we extend the symmetry based linear elastic theory of… read more here.
Keywords: new flexoelectric; bend nematic; twist bend; nematic phase ... See more keywords
Liquid crystal dimers and the twist-bend nematic phase: On the role of spacers and terminal alkyl chains
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Molecular Liquids"
DOI: 10.1016/j.molliq.2020.114391
Abstract: Abstract The synthesis and characterisation of four series of liquid crystal dimers based on benzylideneaniline mesogenic units, and in which the lengths of terminal alkyloxy chains are varied are reported. The series differ in terms… read more here.
Keywords: twist bend; nematic phase; liquid crystal; bend nematic ... See more keywords
Thioether-linked liquid crystal dimers and trimers: The twist-bend nematic phase
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Molecular Structure"
DOI: 10.1016/j.molstruc.2019.126913
Abstract: Abstract Systematic synthesis of thioether-linked dimers and trimers was carried out to reveal molecular designs for inducing mesophases and twist-bend nematic (NTB) phases. A five-fold approach based on molecular structural parameters including the terminal substituent,… read more here.
Keywords: thioether; twist bend; dimers trimers; bend nematic ... See more keywords
Instabilities in the electric Freedericksz state of the twist-bend nematic liquid crystal CB7CB.
Sign Up to like & getrecommendations! Published in 2018 at "Soft matter"
DOI: 10.1039/c8sm00554k
Abstract: We report on the instabilities in the Freedericksz state of the twist-bend nematic (NTB) liquid crystal 1'',7''-bis(4-cyanobiphenyl-4'-yl)heptane (CB7CB). The quasi homeotropic NTB state, into which a planar (untwisted or 90°-twisted) nematic CB7CB layer transits under… read more here.
Keywords: state; bend nematic; freedericksz state; twist bend ... See more keywords
Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase.
Sign Up to like & getrecommendations! Published in 2022 at "Chemical communications"
DOI: 10.1039/d1cc07012f
Abstract: Liquid crystal oligomers, namely dimers, trimers and tetramers, consisting of cyanobiphenyl and benzylideneaniline-based mesogenic units connected by either linear or bent alkoxy or alkyl spacers are reported. These materials, although built from achiral molecules, show… read more here.
Keywords: liquid crystal; bend nematic; twist bend; phase ... See more keywords
Formation of periodic zigzag patterns in the twist-bend nematic liquid crystal phase by surface treatment
Sign Up to like & getrecommendations! Published in 2017 at "Liquid Crystals"
DOI: 10.1080/02678292.2016.1274283
Abstract: ABSTRACT Zigzag patterns were successfully generated in the twist-bend nematic (NTB) phase of 1-(4-cyanobiphenyl-4′-yl)-6-(4-cyanobiphenyl-4′-yloxy)hexane (CB6OCB) via simple surface treatment. A detailed microscopy study using polarised optical microscopy and fluorescence confocal polarising microscopy was performed to… read more here.
Keywords: phase; bend nematic; microscopy; twist bend ... See more keywords
Twist-bend nematic phases in binary mixtures of banana-shaped liquid crystalline molecules
Sign Up to like & getrecommendations! Published in 2018 at "Liquid Crystals"
DOI: 10.1080/02678292.2017.1395483
Abstract: ABSTRACT We present a mean field theory to describe twist-bend nematic () phases in binary mixtures of banana shaped, such as bent-core or dimer, liquid crystalline (LC) molecules with , where is a twist and… read more here.
Keywords: binary mixtures; bend nematic; phases binary; twist bend ... See more keywords
Nematic and twist-bend nematic drops of surfactant-doped CB7CB as colloidal inclusions: topological defects and field effects
Sign Up to like & getrecommendations! Published in 2024 at "Liquid Crystals"
DOI: 10.1080/02678292.2024.2302971
Abstract: ABSTRACT Some recent studies on liquid crystal dispersions have shown that biphasic states of a mesogenic system, in which one phase appears as droplets or inclusions in the matrix of the other, are a convenient… read more here.
Keywords: nematic twist; topological defects; ntb drops; twist bend ... See more keywords
Material parameters ensuring stability of the twist-bend nematic phase
Sign Up to like & getrecommendations! Published in 2024 at "Liquid Crystals"
DOI: 10.1080/02678292.2024.2333318
Abstract: ABSTRACT Properties of the theoretical model of the twist-bend nematic phase (NTB) proposed by Barbero et al. were taken into account. In particular, the role of material parameters that determine the free energy density of… read more here.
Keywords: twist bend; material parameters; nematic phase; ensuring stability ... See more keywords
Cyanobiphenyl-based liquid crystal dimers and the twist-bend nematic phase: on the role played by the length and parity of the spacer
Sign Up to like & getrecommendations! Published in 2024 at "Liquid Crystals"
DOI: 10.1080/02678292.2024.2381570
Abstract: ABSTRACT Six members of the 1,ω-bis(4-cyanobiphenyl-4′-yl) alkanes are reported and referred to as CBnCB in which n = 1, 15, 16, 17, 19 and 20 and indicates the number of methylene units in the spacer separating the… read more here.
Keywords: twist bend; cyanobiphenyl based; based liquid; nematic phase ... See more keywords
Behaviour of twist-bend nematic structure under a uniform magnetic field
Sign Up to like & getrecommendations! Published in 2017 at "Molecular Crystals and Liquid Crystals"
DOI: 10.1080/15421406.2017.1303598
Abstract: ABSTRACT From the elastic point of view, the twist-bend nematic phase, (NTB), has a ground state characterised by a spontaneous bend with a precession of the director n along the direction of an axis t.… read more here.
Keywords: bend nematic; field; twist bend; behaviour twist ... See more keywords