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Advanced Materials

Orientation of a Helical Nanofilament (B4) Liquid-Crystal Phase: Topographic Control of Confinement, Shear Flow, and Temperature Gradients

Authors

  • Dong Ki Yoon,

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

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

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

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

    1. Department of Chemistry and Liquid Crystal Materials Research Center, University of Colorado, Boulder, CO 80309-0215, USA
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  • Ivan I. Smalyukh,

    1. Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder, CO 80309-0390, USA
    2. Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO 80309, USA
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  • 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

Oriented domains of the chiral/polar crystalline helical nanofilaments of the bent-core liquid crystal B4 phase are reported. A combination of topographic confinement of the bent-core molecule in micrometer-scale rectangular channels etched into a silicon surface with cooling from the isotropic melt in the presence of an air flow over the surface yields nanofilament orientation parallel to the flow.

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