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Prewetting dichlormethane induced aqueous solution adhered on Cassie superhydrophobic substrates to fabricate efficient fog-harvesting materials inspired by Namib Desert Beetles and mussels

Abstract

Namib Desert beetles harvest water from harsh environment by ascribe of the hydrophilic-hydrophobic dorsal surfaces. Generally, Cassie-state superhydrophobic materials were chosen as the substrates to prepare bioinspired (super)hydrophilic/(super)hydrophobic patterned surfaces. However, attributing to the low adhesion and strong repellency, aqueous solution cannot be directly set on Cassie superhydrophobic materials till to the dropping volume larger than 6.5 μL, thus arranging (super)hydrophilic substance on the Cassie superhydrophobic substrates to construct (super)hydrophilic/superhydrophobic patterned surfaces still remains a challenge. In this work, through the prewetting dichlormethane (DCM), the mussels-inspired hydrophilic and bio-adhesive dopamine solution (DA) could be dripped on Cassie superhydrophobic Cu surface with ultralow volume of 0.1 μL, whereby low surface tension DCM would “cloak” high surface tension DA. Along with DCM volatility, DA was adhered on the Cassie superhydrophobic surface and then self-polymerized into hydrophilic polydopamine domains, thus the hydrophilic/superhydrophobic patterned surfaces with efficient water collection could be successfully developed inspired by Namib Desert beetles and mussels. The bioinspired materials show the potential for the real-world industrialization in a large scale, which is of great significance to provide living security for the areas with no access to freshwater.

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Publication details

The article was received on 21 Apr 2018, accepted on 12 Jun 2018 and first published on 13 Jun 2018


Article type: Paper
DOI: 10.1039/C8NR03277G
Citation: Nanoscale, 2018, Accepted Manuscript
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    Prewetting dichlormethane induced aqueous solution adhered on Cassie superhydrophobic substrates to fabricate efficient fog-harvesting materials inspired by Namib Desert Beetles and mussels

    H. Zhu, R. Duan, X. Wang, J. Yang, J. Wang, Y. Huang and F. Xia, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR03277G

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