Aerodynamics-assisted, efficient and scalable kirigami fog collectors.
Aerodynamics-assisted, efficient and scalable kirigami fog collectors.
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DOI:
10.1038/s41467-021-25764-4
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发表时间:
2021-09-16
影响因子:
16.6
通讯作者:
Yang S
中科院分区:
文献类型:
--
作者:
Li J;Ran R;Wang H;Wang Y;Chen Y;Niu S;Arratia PE;Yang S
To address the global water shortage crisis, one of the promising solutions is to collect freshwater from the environmental resources such as fog. However, the efficiency of conventional fog collectors remains low due to the viscous drag of fog-laden wind deflected around the collecting surface. Here, we show that the three-dimensional and centimetric kirigami structures can control the wind flow, forming quasi-stable counter-rotating vortices. The vortices regulate the trajectories of incoming fog clusters and eject extensive droplets to the substrate. As the characteristic structural length is increased to the size of vortices, we greatly reduce the dependence of fog collection on the structural delicacy. Together with gravity-directed gathering by the folds, the kirigami fog collector yields a collection efficiency of 16.1% at a low wind speed of 0.8 m/s and is robust against surface characteristics. The collection efficiency is maintained even on a 1 m2 collector in an outdoor setting. Water shortage not only occurs in arid regions, but also in humid area with little precipitation, despite abundant fog. Authors develop robust and scalable 3D centimetric kirigami structures to control wind flow and regulate the trajectories of incoming fog, yielding high fog collection efficiency.
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影响因子:
13.6
作者:
Fathieh F;Kalmutzki MJ;Kapustin EA;Waller PJ;Yang J;Yaghi OM
通讯作者:
Yaghi OM
DOI:
10.1073/pnas.2011935117
发表时间:
2020-09-22
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