Slippery when wet: mobility regimes of confined drops in electrowetting
نویسندگان
چکیده
منابع مشابه
Slippery and Never Wet
Superhydrophobic surfaces let water droplets roll off with low friction and falling droplets rebound, leaving the surfaces completely dry. Such extremely water repellent surfaces are found in nature on lotus leaves, the legs of water striders and feather coatings of birds, and portray a beautiful example of ingenious biological design. They provide an exciting research avenue for physicists and...
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Electrowetting generates flow patterns inside drops when AC voltages are employed. For AC frequencies around the drop eigenfrequency (typically O(1kHz) or less), capillary waves emanate from the contact line giving rise to a net motion in the bulk of the drop. This flow can be described by a capillary wave-driven Stokes drift. At higher AC frequencies (above 10kHz, depending on liquid conductiv...
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For a liquid droplet to slide down a solid planar surface, the surface usually has to be tilted above a critical angle of approximately 10°. By contrast, droplets of nearly any liquid "slip" on lubricant-infused textured surfaces - so termed slippery surfaces - when tilted by only a few degrees. The mechanism of how the lubricant alters the static and dynamic properties of the drop remains elus...
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ژورنال
عنوان ژورنال: Soft Matter
سال: 2019
ISSN: 1744-683X,1744-6848
DOI: 10.1039/c9sm01107b