Colored Samples (IMAGE) Harvard University Caption These are gold films colored with nanometer-thick layers of germanium. Credit Photo courtesy of Mikhail Kats, Romain Blanchard, and Patrice Genevet 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.