Nano Archive

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

Chen, QW and Yao, X and Xu, L and Li, QK and Song, YL and Jiang, L (2010) Capillary force restoration of droplet on superhydrophobic ribbed nano-needles arrays. SOFT MATTER . ISSN 1744-683X

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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.

Item Type:Article
Subjects:Material Science > Nanochemistry
ID Code:9668
Deposited By:CSMNT
Deposited On:25 Sep 2010 12:41
Last Modified:25 Sep 2010 12:41

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