Nanopillars (IMAGE)

Virginia Tech

Nanopillars

Caption

Essentially, when the nanopillars are tall and slender, the droplets formed inside and on the crevices can jump off the surface at a much smaller size, down to two micrometers. Likewise, short and stout pillars increase the size of the droplet required to jump -- up to 20 micrometers in the case of Mulroe's experiment.

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Virginia Tech

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