Nanotechnology - Water bouncing on carbon nanotube array

This ultra-high speed film shows the superhydrophobic (water avoiding) nature of a carbon nanotube array. The force of surface tension in the water droplet is much greater than the attractive force between the droplet and the array, so the water remains a droplet instead of spreading out and soaking into the array.

Many everyday objects have hydrophobic coatings: eyeglasses, automobiles, kitchenware, carpets, and some clothing.