Issue 11, 2010
From the journal:

Soft Matter

Capillary force restoration of droplet on superhydrophobic ribbed nano-needles arrays

Qinwen Chen,ab   Xi Yao,ab   Liang Xu,ab   Qikai Li,a   Yanlin Songa  and  Lei Jiang*a  

* Corresponding authors

a Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190 Beijing, P. R. China
E-mail: jianglei@iccas.ac.cn

b Graduate School of Chinese Academy of Sciences, 100049 Beijing, P. R. China

Abstract

Previous experiments have observed squeezing and relaxing droplets between two identical superhydrophobic surfaces decorated by the ribbed nano-needles arrays (RNNA) leading to a fully reversible dynamic process. This reversibility presents a capillary force restoration accompanying deformation of the water droplet, which mainly depends on the surface microstructures. Based on the quasi-static equilibrium of droplet compression, we have deduced and numerically computed the capillary force utilizing a classical mechanics approach. The simulated forces agree well with the experimental results. The restoration mechanism is further explored and revealed by the calculated microscopic contact angle and the liquid–air interface around the nanoneedles.

Graphical abstract: Capillary force restoration of droplet on superhydrophobic ribbed nano-needles arrays

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Article information

DOI
https://doi.org/10.1039/B925988K
Article type
Paper
Submitted
15 Dec 2009
Accepted
04 Mar 2010
First published
14 Apr 2010

Soft Matter, 2010,6, 2470-2474

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Capillary force restoration of droplet on superhydrophobic ribbed nano-needles arrays

Q. Chen, X. Yao, L. Xu, Q. Li, Y. Song and L. Jiang, Soft Matter, 2010, 6, 2470 DOI: 10.1039/B925988K

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