18 August 2015
Imagine staying dry underwater for months. Engineers have examined a variety of surfaces that can do just that — and they know why. They have identified the ideal ‘roughness’ needed in a surface’s texture to keep it dry for a long time when submerged in water. The valleys in the surface roughness typically need to be less than one micron in width. That’s really small — but these nanoscopic valleys have macroscopic impact.
http://www.sciencedaily.com/releases/2015/08/150818142601.htm
