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Advanced Materials

Superhydrophobic to Superhydrophilic Wetting Transition with Programmable Ion-Pairing Interaction

Authors

  • Ho Sun Lim,

    1. Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea)
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  • Seung Goo Lee,

    1. Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea)
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  • Dae Ho Lee,

    1. Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea)
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  • Dong Yun Lee,

    1. Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea)
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  • Shichoon Lee,

    1. Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea)
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  • Kilwon Cho

    Corresponding author
    1. Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea)
    • Department of Chemical Engineering, Polymer Research Institute Pohang University of Science and Technology Pohang, 790–784 (Korea).
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  • This work was supported by a grant (M108KO010008K1501-00810) from the Center for Nanostructural Materials Technology under the 21st Century Frontier R&D Programs of the Ministry of Education, Science and Technology, and a grant (R01-2006-000-10749-0) from the Basic Research Program of the Korea Science and Engineering Foundation, Korea. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

Smart surfaces with switchable wettability are fabricated by using facile surface roughness control with a galvanic cell displacement reaction and attaching polyelectrolyte brushes with quaternary ammonium groups. The reversible switch between superhydrophobicity and superhydrophilicity is achieved by direct counterion exchange. This approach combines well-understood physical and chemical concepts and opens up new applications for external stimuli-responsive smart surfaces.

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