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Issue 6, 2015
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Inkjet printing for direct micropatterning of a superhydrophobic surface: toward biomimetic fog harvesting surfaces

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Abstract

The preparation of biomimetic superhydrophobic surfaces with hydrophilic micro-sized patterns is highly desirable, but a one-step, mask-free method to produce such surfaces has not previously been reported. We have developed a direct method to produce superhydrophilic micropatterns on superhydrophobic surfaces based on inkjet printing technology. This work was inspired by the efficient fog-harvesting behavior of Stenocara beetles in the Namib Desert. A mussel-inspired ink consisting of an optimized solution of dopamine was applied directly by inkjet printing to superhydrophobic surfaces. Stable Wenzel's microdroplets of the dopamine solution with well-defined micropatterns were obtained on these surfaces. Superhydrophilic micropatterns with well-controlled dimensions were then readily achieved on the superhydrophobic surfaces by the formation of polydopamine via in situ polymerization. The micropatterned superhydrophobic surfaces prepared by this inkjet printing method showed enhanced water collection efficiency compared with uniform superhydrophilic and superhydrophobic surfaces. This method can be used for the facile large-scale patterning of superhydrophobic surfaces with high precision and superior pattern stability and is therefore a key step toward patterning superhydrophobic surfaces for practical applications.

Graphical abstract: Inkjet printing for direct micropatterning of a superhydrophobic surface: toward biomimetic fog harvesting surfaces

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Publication details

The article was received on 30 Oct 2014, accepted on 04 Dec 2014 and first published on 04 Dec 2014


Article type: Paper
DOI: 10.1039/C4TA05862C
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2015,3, 2844-2852
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    Inkjet printing for direct micropatterning of a superhydrophobic surface: toward biomimetic fog harvesting surfaces

    L. Zhang, J. Wu, M. N. Hedhili, X. Yang and P. Wang, J. Mater. Chem. A, 2015, 3, 2844
    DOI: 10.1039/C4TA05862C

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