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Lateral Buckling of High Aspect Ratio Janus Nanowalls

Authors

  • Hyunsik Yoon,

    1. Department of Chemical Engineering, Seoul National University of Science & Technology, Seoul, 139-743, Korea
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  • Abhijit Ghosh,

    1. Department of Chemical and Biomolecular Engineering, Sogang University, 1 Sinsu-dong, Mapo-gu, Seoul 121-732, Korea
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  • Jung Yeon Han,

    1. The National Creative Research Initiative Center for Intelligent Hybrids, School of Chemical & Biological Engineering, The WCU Program of Chemical Convergence for Energy and Environment, Seoul National University, Seoul, 151-744, Korea
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  • Seung Hyun Sung,

    1. The National Creative Research Initiative Center for Intelligent Hybrids, School of Chemical & Biological Engineering, The WCU Program of Chemical Convergence for Energy and Environment, Seoul National University, Seoul, 151-744, Korea
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  • Won Bo Lee,

    Corresponding author
    1. Department of Chemical and Biomolecular Engineering, Sogang University, 1 Sinsu-dong, Mapo-gu, Seoul 121-732, Korea
    • Department of Chemical and Biomolecular Engineering, Sogang University, 1 Sinsu-dong, Mapo-gu, Seoul 121-732, Korea.
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  • Kookheon Char

    Corresponding author
    1. The National Creative Research Initiative Center for Intelligent Hybrids, School of Chemical & Biological Engineering, The WCU Program of Chemical Convergence for Energy and Environment, Seoul National University, Seoul, 151-744, Korea
    • The National Creative Research Initiative Center for Intelligent Hybrids, School of Chemical & Biological Engineering, The WCU Program of Chemical Convergence for Energy and Environment, Seoul National University, Seoul, 151-744, Korea
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Abstract

In recent years, the fabrication of Janus materials and their potential applications has been of much interest in Materials Science. Here, we report the fabrication of an entirely novel structure–Janus nanowalls and the phenomenon of lateral buckling in them. Polymeric nanowalls were prepared with the replica molding technique and metal films, of comparable thicknesses, were then deposited on one side of the polymer nanowalls by vacuum process. During the metal deposition, the nanowalls themselves buckle laterally; this buckling is induced by the compressive residual stress in the metal film and geometric confining constraints. The feature of wrinkle patterns resulting from the lateral buckling was theoretically investigated using the scaling analysis. Theoretical results are in good agreement with the experimental observations.

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