Cover Picture: Structure of the B4 Liquid Crystal Phase near a Glass Surface (ChemPhysChem 1/2012)

Authors

  • Dong Chen,

    Corresponding author
    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
    • Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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    • These authors contributed equally to this work.

  • Michael-Scott Heberling,

    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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    • These authors contributed equally to this work.

  • Dr. Michi Nakata,

    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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    • Deceased.

  • Dr. Loren E. Hough,

    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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  • Prof. Joseph E. Maclennan,

    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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  • Prof. Matthew A. Glaser,

    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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  • Dr. Eva Korblova,

    1. Department of Chemistry and Biochemistry and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0215 (USA)
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  • Prof. David M. Walba,

    1. Department of Chemistry and Biochemistry and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0215 (USA)
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  • Prof. Junji Watanabe,

    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S8-42 O-okayama, Meguro-ku Tokyo 152-8552 (Japan)
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  • Prof. Noel A. Clark

    Corresponding author
    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
    • Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder CO 80309-0390 (USA)
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Abstract

original image

Bent-core mesogenic molecules organize into layered smectic liquid-crystal phases that have a strong inherent tendency for saddle-splay deformation of the molecular layers. One important class of such materials are the helical nanofilament phases, hierarchical self-assemblies in which growth of the liquid crystal is limited to twisted filaments that have saddle-splayed layers exhibiting Gaussian curvature but no net curvature (insets). These filaments pack to fill space in the bulk phase, but at the liquid-crystal–glass interface they exhibit a variety of exotic intermediate focal conic-related structures (background) having both Gaussian and net curvature, formed from the competition between the surface constraints and the tendency for layer twist. The work is presented by D. Chen, N. A. Clark et al. on p. 155 Ms. Heulwen Price is kindly acknowledged for putting the finishing touches to the cover image.

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