Desert Beetle‐Inspired Superwettable Patterned Surfaces for Water Harvesting

With the impacts of climate change and impending crisis of clean drinking water, designing functional materials for water harvesting from fog with large water capacity has received much attention in recent years. Nature has evolved different strategies for surviving dry, arid, and xeric conditions....

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2017-09, Vol.13 (36), p.n/a
Main Authors: Yu, Zhenwei, Yun, Frank F., Wang, Yanqin, Yao, Li, Dou, Shixue, Liu, Kesong, Jiang, Lei, Wang, Xiaolin
Format: Article
Language:English
Subjects:
Arid regions
bioinspired
Climate change
Coalescing
Coating
Drinking water
Efficiency
fog collection
Harvest
Harvesting
Hydrophobic surfaces
Masks
Nanotechnology
Polydimethylsiloxane
Pulsed laser deposition
Silicon dioxide
Silicone resins
superhydrophilic
superhydrophobic
Wettability
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Summary:With the impacts of climate change and impending crisis of clean drinking water, designing functional materials for water harvesting from fog with large water capacity has received much attention in recent years. Nature has evolved different strategies for surviving dry, arid, and xeric conditions. Nature is a school for human beings. In this contribution, inspired by the Stenocara beetle, superhydrophilic/superhydrophobic patterned surfaces are fabricated on the silica poly(dimethylsiloxane) (PDMS)‐coated superhydrophobic surfaces using a pulsed laser deposition approach with masks. The resultant samples with patterned wettability demonstrate water‐harvesting efficiency in comparison with the silica PDMS‐coated superhydrophobic surface and the Pt nanoparticles‐coated superhydrophilic surface. The maximum water‐harvesting efficiency can reach about 5.3 g cm−2 h−1. Both the size and the percentage of the Pt‐coated superhydrophilic square regions on the patterned surface affect the condensation and coalescence of the water droplet, as well as the final water‐harvesting efficiency. The present water‐harvesting strategy should provide an avenue to alleviate the water crisis facing mankind in certain arid regions of the world. Fog is a potential source of water that could be exploited using an innovative technology. Inspired by the Stenocara beetle, superhydrophilic/superhydrophobic patterned surfaces are fabricated by the pulsed laser deposition technique with a mask. The resultant superwettable patterned samples exhibit superior water‐harvesting efficiency.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201701403