Water Droplet Bouncing on a Superhydrophobic Carbon Nanotube Array

The first two parts of the video show the impact dynamic of 30 microliters water
droplet at different impact velocity. At low impact velocity of 1.03 m/s, the water droplet deforms upon impact and eventually bounces off completely of the surface of the array. At higher impact velocity of 2.21 m/s, the droplet breaks up into many smaller droplets and eventually bounces off completely of the surface of the array.

All parts of the video were captured by high speed camera operated at
various frame rates. The droplet was illuminated from behind with a diffuse
halogen light. The droplet was dropped on the surface by at-tipped needle
and the volume of the droplet was controlled precisely by syringe pump.

This work was supported by The Charyk Foundation and The Fletcher Jones Foundation.

More on this at the LINK: Youtube