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Superhydrophobic to Superhydrophilic Wetting Control in Graphene Films

Authors

  • Javad Rafiee,

    1. Department of Mechanical, Aerospace, and Nuclear Engineering Rensselaer Polytechnic Institute, Troy, NY 12180 (USA)
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  • Mohammad A. Rafiee,

    1. Department of Mechanical, Aerospace, and Nuclear Engineering Rensselaer Polytechnic Institute, Troy, NY 12180 (USA)
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  • Zhong-Zhen Yu,

    1. State Key Laboratory of Chemical Resource Engineering College of Materials Science and Engineering Beijing University of Chemical Technology, Beijing 100029 (China)
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  • Nikhil Koratkar

    Corresponding author
    1. Department of Mechanical, Aerospace, and Nuclear Engineering Rensselaer Polytechnic Institute, Troy, NY 12180 (USA)
    • Department of Mechanical, Aerospace, and Nuclear Engineering Rensselaer Polytechnic Institute, Troy, NY 12180 (USA).
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Abstract

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The wetting of graphene films from superhydrophobic (contact angle of ∼160°) to superhydrophilic (∼0°) is controlled using surface chemistry/roughness effects. Graphene sheets dispersed in water/acetone solvents are deposited on various substrates, where the contact angle of the graphene films could be tuned from superhydrophobic to superhydrophilic by simply controlling the relative proportion of acetone and water in the solvent.

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