Gururaj Naik, lab photos (IMAGE) Rice University Caption A new thermal emitter developed by Rice University engineers composed of a tungsten metal sheet, a thin layer of a spacer material and a network of silicon nanocylinders promises efficiencies of over 60%. Credit (Photos by Gustavo Raskosky/Rice University) Usage Restrictions Must credit Gustavo Raskosky/Rice University. License Original 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.