Substrate-Induced Crystal Plastic Phase of a Discotic Liquid Crystal

Authors

  • Gabin Gbabode,

    1. Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP206/1, Boulevard du Triomphe, 1050 Brussels, Belgium
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  • Nicolas Dumont,

    1. Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP206/1, Boulevard du Triomphe, 1050 Brussels, Belgium
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  • Florence Quist,

    1. Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP206/1, Boulevard du Triomphe, 1050 Brussels, Belgium
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  • Guillaume Schweicher,

    1. Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP206/1, Boulevard du Triomphe, 1050 Brussels, Belgium
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  • Armin Moser,

    1. Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria, Laboratory for Chemistry of Novel Materials, Université de Mons/Materia Nova, Place du Parc, 20, B-7000 Mons, Belgium
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  • Pascal Viville,

    1. Laboratory for Chemistry of Novel Materials, Université de Mons/Materia Nova, Place du Parc, 20, B-7000 Mons, Belgium
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  • Roberto Lazzaroni,

    1. Laboratory for Chemistry of Novel Materials, Université de Mons/Materia Nova, Place du Parc, 20, B-7000 Mons, Belgium
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  • Yves H. Geerts

    Corresponding author
    1. Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP206/1, Boulevard du Triomphe, 1050 Brussels, Belgium
    • Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP206/1, Boulevard du Triomphe, 1050 Brussels, Belgium.===

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  • This paper is dedicated to Prof. Klaus Müllen on the occasion of his 65th birthday.

Abstract

original image

A new phase of a known discotic liquid crystal is observed at the interface with a rigid substrate. The structure of the substrate-induced phase has been characterized by atomic force microscopy, specular X-ray diffraction, and small-angle and wide-angle grazing incidence X-ray diffraction. The substrate-induced phase, which has a thickness of ∼30 nm and a tetragonal symmetry, differs notably from the bulk phase. The occurrence of such phase casts a new light on alignment of discotic liquid crystals.

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