Impact of picoliter droplets on superhydrophobic surfaces with ultralow spreading ratios |
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| Authors: | Brown P S Berson A Talbot E L Wood T J Schofield W C E Bain C D Badyal J P S |
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| Affiliation: | Department of Chemistry, Science Laboratories, Durham University, Durham DH1 3LE, United Kingdom. |
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| Abstract: | The impact of picoliter-sized water droplets on superhydrophobic CF(4) plasma fluorinated polybutadiene surfaces is investigated with high-speed imaging. Variation of the surface topography by plasmachemical modification enables the dynamics of wetting to be precisely controlled. Final spreading ratios as low as 0.63 can be achieved. A comparison of the maximum spreading ratio and droplet oscillation frequencies to models described in the literature shows that both are found to be much lower than theoretically predicted. |
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