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Issue 2, 2017
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Tuneable fluidics within graphene nanogaps for water purification and energy storage

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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 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.

Graphical abstract: Tuneable fluidics within graphene nanogaps for water purification and energy storage

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Publication details

The article was received on 13 Sep 2016, accepted on 04 Jan 2017 and first published on 04 Jan 2017


Article type: Communication
DOI: 10.1039/C6NH00167J
Citation: Nanoscale Horiz., 2017,2, 89-98
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    Tuneable fluidics within graphene nanogaps for water purification and energy storage

    Z. Bo, Y. Tian, Z. J. Han, S. Wu, S. Zhang, J. Yan, K. Cen and K. (. Ostrikov, Nanoscale Horiz., 2017, 2, 89
    DOI: 10.1039/C6NH00167J

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