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Microdomain Transformations in Mosaic Mesocrystal Thin Films

Authors

  • Yuan Jiang,

    1. Max Planck Institute of Colloids and Interfaces, Colloid Chemistry, Am Mühlenberg, D-14476 Golm, Germany
    Current affiliation:
    1. Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA
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  • Haofei Gong,

    1. Institute of Physics, Chair of Solid State & Materials Chemistry, Augsburg University, D-86159 Augsburg, Germany
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  • Maciej Grzywa,

    1. Institute of Physics, Chair of Solid State & Materials Chemistry, Augsburg University, D-86159 Augsburg, Germany
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  • Dirk Volkmer,

    1. Institute of Physics, Chair of Solid State & Materials Chemistry, Augsburg University, D-86159 Augsburg, Germany
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  • Laurie Gower,

    1. Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA
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  • Helmut Cölfen

    Corresponding author
    1. Max Planck Institute of Colloids and Interfaces, Colloid Chemistry, Am Mühlenberg, D-14476 Golm, Germany
    Current affiliation:
    1. Physical Chemistry, University of Konstanz, D-78457 Konstanz, Germany
    • Max Planck Institute of Colloids and Interfaces, Colloid Chemistry, Am Mühlenberg, D-14476 Golm, Germany.
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Abstract

An easy design route via simple evaporation is reported for macroscopic mosaic thin films comprising the quaternary system of dl-lysine·HCl, poly(acrylic acid), water, and EtOH. By depositing droplets of the quaternary dispersions onto hydrophilic cover slips, the formation of macroscopic crack-free mosaic mesocrystal thin films are produced. The formation follows a multistage crystallization process, which includes the formation of a polymer-induced liquid-precursor (PILP) phase, the formation of spherulitic thin films, and the recrystallization of mosaic mesocrystal thin films. A slow cooling rate is noted to be beneficial for the mesocrystal thin films, enabling the films to be crack-free and to display low surface roughness at the nanoscale.

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