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Water scarcity is a global problem and collecting water from the air is a viable solution to this crisis. Inspired by Namib Desert beetle, leaf venation and spider silk, we designed an integrated biomimetic system with hybrid wettability and wettability gradient. The hybrid hydrophilic–hydrophobic wettability design that bionomics desert beetle's back can construct a three-dimensional topography with a water layer on the surface, expanding the contact area with the fog flow and thus improving the droplet trapping efficiency. The venation-like structure with wettability gradient not only provides a planned path for water transportation, but also accelerates water removal under the synergistic effect of gravity and wettability driving force, thus further improving the surface regeneration rate. The collector combines droplet capture, coalescence, transportation, separation, and storage capabilities, which provides new ideas for the design of future high-efficiency fog collectors.
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Guangyi Tian
Hubei University
Changhui Fu
Chinese Academy of Sciences
Zhiguang Guo
Sichuan University
ACS Applied Materials & Interfaces
Chinese Academy of Sciences
Lanzhou Institute of Chemical Physics
Hubei University
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Tian et al. (Thu,) studied this question.
synapsesocial.com/papers/68e5cfeeb6db643587565e4a — DOI: https://doi.org/10.1021/acsami.4c06032
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