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A functional interface based on silicon chamfer nanocylinder arrays (CNCAs) was successfully fabricated by carrying out secondary etching of silicon nanopillar arrays via a facile inclined etching method. The structure of the novel CNCAs was finely modulated by varying the nanopillar array structure and the etching conditions. The underwater oil wetting behavior of this CNCAs-based interface can be easily modulated from superoleophilic (oil contact angle (OCA) of ~8.13°) state to superoleophobic (OCA of ~163.79°) state by modifying the surface using different substances. Moreover, a reversible transformation of underwater oil wetting behavior from superoleophobic (OCA of ~155.67°) state to oleophilic (OCA of ~31.27°) state was achieved by grafting a temperature-responsive polymer onto this specific asymmetric structure. The functional interface exhibited isotropic wetting behavior under certain oleophilic conditions. Chemically heterogeneous structures, obtained via asymmetry modification of CNCAs, exhibited amphiphobic properties while maintaining their anisotropic wetting ability.

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nr-9-10-3141_ESM.pdf (2.2 MB)
Publication history
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Acknowledgements

Publication history

Received: 28 May 2016
Revised: 29 June 2016
Accepted: 03 July 2016
Published: 25 July 2016
Issue date: October 2016

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was financially supported by the National Basic Research Program of China (973 program) (No. 2012CB933800), and the National Natural Science Foundation of China (NSFC) (No. 91123031).

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