Droplet Figure (IMAGE) Duke University Caption A graphic of now the new droplet-based electrical hotspot cooling system works. Heat vaporizes water trapped in a sponge-like layer and the vapor droplets carry away heat. The vapor then coalesces on a cooled super-hydrophobic floor, jumping back up beneath hotspots when they become large enough. Credit Chuan-Hua Chen, Duke University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.