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CONVECTIVE PATTERNS IN LIQUID CRYSTALS DRIVEN BY ELECTRIC FIELD

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Advances in Sensing with Security Applications

Part of the book series: NATO Science Series II: Mathematics, Physics and Chemistry ((NAII,volume 218))

Abstract

A systematic overview of various electric-field induced pattern forming instabilities in nematic liquid crystals is given. Particular emphasis is laid on the characterization of the threshold voltage and the critical wavenumber of the resulting patterns. The standard hydrodynamic description of nematics predicts the occurrence of striped patterns (rolls) in five different wavenumber ranges, which depend on the anisotropies of the dielectric permittivity and of the electrical conductivity as well as on the initial director orientation (planar or homeotropic). Experiments have revealed two additional pattern types which are not captured by the standard model of electroconvection and which still need a theoretical explanation.

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Author information

Authors and Affiliations

  1. Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, Budapest, H-1525, POB. 49, Hungary

    Agnes Buka

  2. Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, Budapest, H-1525, POB. 49, Hungary

    Nándor Éber

  3. Institute of Physics, University of Bayreuth, Bayreuth, D-95440, Germany

    Werner Pesch

  4. Institute of Physics, University of Bayreuth, Bayreuth, D-95440, Germany

    Lorenz Kramer

Authors
  1. Agnes Buka
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  2. Nándor Éber
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  3. Werner Pesch
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  4. Lorenz Kramer
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Editor information

Editors and Affiliations

  1. Northwestern University, Evanston, IL, USA

    Alexander A. Golovin

  2. Israel Institute of Technology, Haifa, Israel

    Alexander A. Nepomnyashchy

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© 2006 Springer

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Buka, A., Éber, N., Pesch, W., Kramer, L. (2006). CONVECTIVE PATTERNS IN LIQUID CRYSTALS DRIVEN BY ELECTRIC FIELD. In: Golovin, A.A., Nepomnyashchy, A.A. (eds) Advances in Sensing with Security Applications. NATO Science Series II: Mathematics, Physics and Chemistry, vol 218. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4355-4_02

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