Advanced Materials

Gas-Driven Ultrafast Reversible Switching of Super-hydrophobic Adhesion on Palladium-Coated Silicon Nanowires

Authors

  • Jungmok Seo,

    1. Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
    Current affiliation:
    1. These authors equally contributed to this work.
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  • Soonil Lee,

    1. Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
    Current affiliation:
    1. These authors equally contributed to this work.
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  • Heetak Han,

    1. Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
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  • Hwae Bong Jung,

    1. Nano Device Laboratory, Department of Materials Science and Engineering, Yonsei University, 262 Sengsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
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  • Juree Hong,

    1. Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
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  • Giyoung Song,

    1. Nanopolymers Laboratory, Department of Materials Science and Engineering, Yonsei University, 262 Sengsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
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  • Suk Man Cho,

    1. Nanopolymers Laboratory, Department of Materials Science and Engineering, Yonsei University, 262 Sengsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
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  • Cheolmin Park,

    1. Nanopolymers Laboratory, Department of Materials Science and Engineering, Yonsei University, 262 Sengsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
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  • Wooyoung Lee,

    1. Nano Device Laboratory, Department of Materials Science and Engineering, Yonsei University, 262 Sengsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
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  • Taeyoon Lee

    Corresponding author
    1. Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
    • Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea.
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Abstract

A gas-driven ultrafast adhesion switching of water droplets on palladium-coated Si nanowire arrays is demonstrated. By regulating the gas-ambient between the atmosphere and H2, the super-hydrophobic adhesion is repeatedly switched between water-repellent and water-adhesive. The capability of modulating the super-hydrophobic adhesion on a super-hydrophobic surface with a non-contact mode could be applicable to novel functional lab-on-a-chip platforms.

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