Journal ArticleDOI
Tilt Angle Determination of a Smectic C Phase by Field-Induced Freedericksz Transition and x ray Investigations
TLDR
In this paper, a smectic C liquid crystal exhibiting positive dielectric anisotropy was oriented with the director parallel to the glass substrates, and when an electric field was applied normal to the director direction, a Dielectric reorientation (Freedericksz transition) occurred.Abstract:
A smectic C liquid crystal exhibiting positive dielectric anisotropy was oriented with the director parallel to the glass substrates. When an electric field was applied normal to the director direction a dielectric reorientation (Freedericksz transition) occurred. Dissolving a dichroic dye in the smectic C phase and applying an electric field, a guest host effect similar to nematic phases was observed. From the dielectric reorientation the tilt angle of the smectic C phase was determined at different temperatures. The tilt angles obtained by the electrooptical measurements agree sufficiently with the values measured by x ray investigations.read more
Citations
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Patent
Chiral smectic C or H liquid crystal electro-optical device
Noel A. Clark,Sven T. Lagerwall +1 more
TL;DR: An electro-optical device including a chiral smectic C or H liquid crystal disposed between flat plates treated to enforce molecular orientation parallel to the plates is described in this article, where the plates are spaced by a distance sufficiently small to ensure unwinding of the helix typical in a bulk of the material to form two stable states of the orientation field.
Patent
Surface stabilized ferroelectric liquid crystal devices
Noel A. Clark,Sven T. Lagerwall +1 more
TL;DR: In this article, a liquid crystal device including a ferroelectric liquid crystal disposed between plates treated to enforce a particular magnetometer orientation to the plates is described. But the plates are spaced by a distance sufficiently small to ensure unwinding of the helix typical in a bulk of the material to form either monostable, bistable or multistable states which exhibit novel electrooptic properties.
Journal ArticleDOI
Surface-stabilized ferroelectric liquid crystal electro-optics: New multistate structures and devices
Noel A. Clark,Sven T. Lagerwall +1 more
TL;DR: In this paper, surface-stabilized ferroelectric liquid crystal electro-optics have been studied in the context of multistate structures and devices, and they have been shown to have promising performance.
PatentDOI
Ferroelectric liquid crystals
Bak Gun Dipl Chem Yong,Barth Petra,Demus Dietrich,Joachimi Detlev,Barbara Dipl Chem Kampa,Saskia Kohler,K. Mohr,Reinhard Paschke,Gerhard Pelzl,Ulrich Dipl Chem Rosenfeld,Wolfgang Schäfer,Klaus-Dieter Dipl Chem Scherf,Carsten Tschirske,Wolfgang Weissflog,Horst Zaschke +14 more
TL;DR: Fast switching displays with memory properties are provided, which can display digits, symbols, and images, and which contain as chemically and thermally stable ferroelectric liquid crystalline substances.
Book ChapterDOI
Dielectric Behavior of Liquid Crystals
TL;DR: Mise au point. Comportement dielectrique des phases reentrantes. Relaxation relaxation dans des cristaux liquides polymeres as discussed by the authors.
References
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Journal ArticleDOI
Electro-optic response times in liquid crystals
E. Jakeman,E. P. Raynes +1 more
TL;DR: In this article, the factors governing electrically induced phase transitions and other electro-optic effects in liquid crystals are discussed and experimental results presented, and it is shown that by suitably tailoring materials response times of the order of microseconds can be achieved.
Journal ArticleDOI
Guest-Host Interactions in Nematic Liquid Crystals
TL;DR: In this article, a new electro-optic effect based on guest-host interactions in nematic liquid crystals is described, where the cooperative alignment of a nematic crystal in an electric field is used to orient "guest" pleochroic dye molecules (molecules whose absorption spectrum is a function of the molecular orientation with respect to the polarization of the incident light).
Journal ArticleDOI
Nuclear magnetic resonance studies of smectic liquid crystals
Zeev Luz,Saul Meiboom +1 more
TL;DR: In this article, nuclear magnetic resonance measurements in the smectic liquid crystalline phases of seven thermotropic compounds are reported, including terephthalbis(butylaniline), ethyl(methoxybenzylidene)amino] cinnamate, diheptyloxyazoxybenzinene, octyloxybenzoic acid, dipentylazoxycinnamate; diethylazioxcinnamic; dietHylazoxoxybenzosate; diheptonyloxy-benzene;
Journal ArticleDOI