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  • Tuneable fluidics within graphene nanogaps for water purification and energy storage

    Author(s)
    Bo, Zheng
    Tian, Yilei
    Han, Zhao Jun
    Wu, Shenghao
    Zhang, Shuo
    Yan, Jianhua
    Cen, Kefa
    Ostrikov, Kostya Ken
    Griffith University Author(s)
    Ostrikov, Ken
    Year published
    2017
    Metadata
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    Abstract
    Precise control of liquid-solid interactions within sub-micrometer spaces is critical to maximize the active surface areas in porous materials, yet is challenging because of the limited liquid penetration. Here we discover an effective, dry-climate natural plant-inspired approach to guide water into sub-micrometer graphene microwells (Sub-μGWs) and to tune the transition from the hydrophobic to superhydrophilic states. Dry plasma texturing of Sub-μGWs by graphene 'nano-flaps' which adjust the tilt and density upon controlled liquid evaporation leads to controlled and stable sub-micrometer-scale surface modification and ...
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    Precise control of liquid-solid interactions within sub-micrometer spaces is critical to maximize the active surface areas in porous materials, yet is challenging because of the limited liquid penetration. Here we discover an effective, dry-climate natural plant-inspired approach to guide water into sub-micrometer graphene microwells (Sub-μGWs) and to tune the transition from the hydrophobic to superhydrophilic states. Dry plasma texturing of Sub-μGWs by graphene 'nano-flaps' which adjust the tilt and density upon controlled liquid evaporation leads to controlled and stable sub-micrometer-scale surface modification and variable wettability in a wide range. This effect helps capture Au nanoparticles on the Sub-μGW surfaces as a proof-of-principle water purification platform and tune the charge-storage capacity and frequency response of Sub-μGW-based supercapacitors without altering the Sub-μGW backbones. The outcomes may be extended into diverse materials and solutions thus opening new opportunities for next-generation devices, systems and applications.
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    Journal Title
    Nanoscale Horizons
    Volume
    2
    Issue
    2
    DOI
    https://doi.org/10.1039/c6nh00167j
    Subject
    Nanomaterials
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Physical
    Nanoscience & Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/408337
    Collection
    • Journal articles

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