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  • Harvesting water surface energy: self-jumping nanostructured hydrophobic metals

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    Ostrikov510079-Published.pdf (2.697Mb)
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    Author(s)
    Tsai, Jing Yuan
    Huang, Guan Fu
    Shieh, Jiann
    Hsu, Chin Chi
    Ostrikov, Kostya Ken
    Griffith University Author(s)
    Ostrikov, Ken
    Year published
    2021
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    Abstract
    Water in motion is a significant energy source worldwide, but the surface energy of water is rarely utilized as a power source. In this study, we made metals unsinkable and able to jump out of the water by harvesting the water surface energy. This effect is attributed to the enhanced floating ability of the nanostructures on copper and stainless steel foil surfaces. Sufficiently thin hydrophobic metals can slowly float underwater through air trapping at the surface and then rapidly leap out of the water on contact with the water-air interface. The mechanism is related to the surface energy of the water, which contributes to ...
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    Water in motion is a significant energy source worldwide, but the surface energy of water is rarely utilized as a power source. In this study, we made metals unsinkable and able to jump out of the water by harvesting the water surface energy. This effect is attributed to the enhanced floating ability of the nanostructures on copper and stainless steel foil surfaces. Sufficiently thin hydrophobic metals can slowly float underwater through air trapping at the surface and then rapidly leap out of the water on contact with the water-air interface. The mechanism is related to the surface energy of the water, which contributes to the 15 mg metals with a power of 0.49 μW experiencing rapid changes in velocity and acceleration at the interface. The conversion of surface energy to eject nanostructured hydrophobic materials from the liquid surface may lead to new solid-liquid separation techniques.
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    Journal Title
    iScience
    Volume
    24
    Issue
    7
    DOI
    https://doi.org/10.1016/j.isci.2021.102746
    Copyright Statement
    © The Author(s) 2021. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
    Subject
    Environmental nanotechnology and nanometrology
    Nanotechnology
    Science & Technology
    Multidisciplinary Sciences
    Science & Technology - Other Topics
    SUPERHYDROPHOBIC SURFACES
    SILICA NANOWIRES
    Publication URI
    http://hdl.handle.net/10072/407470
    Collection
    • Journal articles

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