Alignment of Lamellar Block Copolymers via Electrohydrodynamic-Driven Micropatterning

Authors

  • Nicoleta E. Voicu,

    1. Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (UK)
    2. The Nanoscience Center, Interdisciplinary Research Collaboration in Nanotechnology, University of Cambridge 11 J. J. Thomson Avenue, Cambridge CB3 0FF (UK)
    3. Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
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  • Sabine Ludwigs,

    Corresponding author
    1. Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (UK)
    2. The Nanoscience Center, Interdisciplinary Research Collaboration in Nanotechnology, University of Cambridge 11 J. J. Thomson Avenue, Cambridge CB3 0FF (UK)
    3. Institute for Macromolecular Chemistry & Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg (Germany)
    • Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (UK).
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  • Ullrich Steiner

    Corresponding author
    1. Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (UK)
    2. The Nanoscience Center, Interdisciplinary Research Collaboration in Nanotechnology, University of Cambridge 11 J. J. Thomson Avenue, Cambridge CB3 0FF (UK)
    • Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (UK).
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  • We thank E. J. W. Crossland for his help with solvent annealing and degradation experiments. We acknowledge financial support from the Dutch “Stichting voor Fundamenteel Onderzoek der Materie” (FOM) (The Netherlands) for N.E.V., and the European Network “Polyfilm” under RTN-6 for S.L. and U.S.

Abstract

original image

The alignment of lamellar block copolymer in cylindrical confinement is investigated. Liquefied polystyrene-block-poly(methyl methacrylate) copolymer films exposed to an electric field form micrometer-sized columns with the lamellae aligned parallel to the cylinder axis. The lateral arrangement of the lamellae is determined by the interplay of surface tension, lateral components of the applied electric field, and the bending of the lamellae.

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