Imaging an Ionic Liquid Adlayer by Scanning Tunneling Microscopy at the Solid|Vacuum Interface

Authors

  • Thomas Waldmann,

    1. Institute of Surface Chemistry and Catalysis, Ulm UniversityD-89069 Ulm (Germany), Fax: (+49) (0)731/50-25452
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  • Hsin-Hui Huang,

    1. Institute of Surface Chemistry and Catalysis, Ulm UniversityD-89069 Ulm (Germany), Fax: (+49) (0)731/50-25452
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  • Prof. Dr. Harry E. Hoster,

    1. Institute of Surface Chemistry and Catalysis, Ulm UniversityD-89069 Ulm (Germany), Fax: (+49) (0)731/50-25452
    2. Current address: TUM CREATE Centre for Electromobility, Singapore 637459 (Singapore)
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  • Dr. Oliver Höfft,

    1. Institute of Particle Technology, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld (Germany)
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  • Prof. Dr. Frank Endres,

    1. Institute of Particle Technology, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld (Germany)
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  • Prof. Dr. R. Jürgen Behm

    Corresponding author
    1. Institute of Surface Chemistry and Catalysis, Ulm UniversityD-89069 Ulm (Germany), Fax: (+49) (0)731/50-25452
    • Institute of Surface Chemistry and Catalysis, Ulm UniversityD-89069 Ulm (Germany), Fax: (+49) (0)731/50-25452
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Abstract

original image

Structure formation in an ionic liquid adlayer: First molecularly resolved scanning tunneling microscopy images of an ionic liquid adlayer ([Py1,4]+ [FAP] (see image)), evaporated on a Au(111) surface, resolve a molecular pattern at 210 K with a distinct short range order, indicating a 2D solid, while at room temperature, the mobility of the adlayer is too high to resolve molecular features, as expected for a 2D liquid.

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