Thermal 3 (IMAGE) Rice University Caption Rice University graduate student Xinwei Li, left, and postdoctoral researcher Weilu Gao used carbon nanotube films Gao helped develop to create a device to recycle waste heat. It could ultimately enhance solar cell output and increase the efficiency of industrial waste-heat recovery. Credit Jeff Fitlow/Rice 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.