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Issue 42, 2017
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Contrasting water adhesion strengths of hydrophobic surfaces engraved with hierarchical grooves: lotus leaf and rose petal effects

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Abstract

The (de)wetting transitions of hierarchical grooves periodically engraved on a hydrophobic surface were investigated using a fully atomistic molecular dynamics simulation. The (meta) stable and transition states with sagging or depinning liquid surfaces were identified by calculating the free energy profiles of the (de)wetting transitions. The dewetting transitions for wide and narrow minor grooves have large and small activation free energies, respectively, exhibiting contrasting water adhesion forces as found for rose petals and lotus leaves.

Graphical abstract: Contrasting water adhesion strengths of hydrophobic surfaces engraved with hierarchical grooves: lotus leaf and rose petal effects

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Article information


Submitted
03 Aug 2017
Accepted
22 Sep 2017
First published
26 Sep 2017

Nanoscale, 2017,9, 16200-16204
Article type
Paper

Contrasting water adhesion strengths of hydrophobic surfaces engraved with hierarchical grooves: lotus leaf and rose petal effects

Z. Zhang, M. Y. Ha and J. Jang, Nanoscale, 2017, 9, 16200
DOI: 10.1039/C7NR05713J

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