Journal ArticleDOI
Electrohydrodynamic and Dielectric Instabilities of Cholesteric Liquid Crystals
TLDR
In this article, a model for electrohydrodynamic alignment effects in cholesteric liquid crystals is proposed and a formula for the threshold voltage of such alignment, starting from the planar texture between two conducting plates.Abstract:
A model is proposed for electrohydrodynamic alignment effects in cholesteric liquid crystals. We derive and discuss a formula for the threshold voltage of such alignment, starting from the planar texture between two conducting plates. An improved formula for the threshold of the dielectric deformation of this orientation pattern is also given.read more
Citations
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Journal ArticleDOI
Physics of liquid crystals
TL;DR: In this article, the physical properties of nematic, cholesteric, and smectic liquid crystals are discussed and a wide variety of phenomena in liquid crystals, including elastic distortions, disclinations, flow properties, fluctuations, light scattering, wave propagation, nuclear magnetic resonance, effects of magnetic and electric fields, electrohydrodynamics, and optical properties.
Journal ArticleDOI
Short Fundamental Equations of State for 20 Industrial Fluids
Eric W. Lemmon,Roland Span +1 more
TL;DR: In this paper, the coefficients of these short forms for the equations of state have been fitted for the fluids acetone, carbon monoxide, carbonyl sulfide, decane, hydrogen sulfide and fluoromethane.
Journal ArticleDOI
Static distortions of a cholesteric planar structure induced by magnetic or ac electric fields
TL;DR: In this article, the threshold conditions for the nucleation of a static Helfrich distortion of a planar cholesteric structure under a magnetic field or an ac electric field applied parallel to the helical axis were discussed.
Journal ArticleDOI
Controlling the Photonic Properties of Cholesteric Cellulose Nanocrystal Films with Magnets.
TL;DR: This simple and yet powerful technique unlocks new possibilities in designing the visual appearance of such iridescent films, paving the way for the development of truly sustainable photonic pigments in coatings, cosmetics, and security labeling.
References
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BookDOI
Liquid crystals and ordered fluids
TL;DR: In this paper, the authors present a NMR study of the transition of a mixture of two Isomeric Cyano-Ester homologous series, showing that the phase transition of one of the two isomeric versions of this series is a transition of the other.
Journal ArticleDOI
Erratum: Conduction‐Induced Alignment of Nematic Liquid Crystals: Basic Model and Stability Considerations
TL;DR: In this article, the stability of a uniform orientation pattern in electric fields parallel or perpendicular to the preferred axis is investigated, with respect to a complete set of sinusoidal perturbations and including distortional and (stabilizing) magnetic torques.
Journal ArticleDOI
Deformation of cholesteric liquid crystals with low threshold voltage
TL;DR: In this article, it was shown theoretically that the orientation pattern of cholesteric liquid crystals can be less stable in electric and magnetic fields than was previously thought, and that the planar texture between two conducting glass plates may become unstable at voltages much below those needed to unwind the helix.
Journal ArticleDOI
Electrohydrodynamic Stability of Space‐Charge‐Limited Currents in Dielectric Liquids. I. Theoretical Study
J. M. Schneider,P. K. Watson +1 more
TL;DR: In this paper, an analysis of the steady cellular convection which results when charge is injected uniformly into the free surface of a film of an insulating liquid is discussed; the method of exchange of stabilities is assumed to be valid; velocity and potential perturbations on the initial steady state lead to a characteristic equation which determines the conditions for onset of instability.
Journal ArticleDOI
Continuum Theory of Liquid Crystals of Nematic Type
TL;DR: In this paper, the authors describe continuum theory now being used to describe macroscopic behavior of liquid crystals of the nematic type, and two types of predictions are discussed: propagation of orientation waves and effects of simple electromagnetic fields.