Graphene flake (IMAGE) University of Göttingen Caption Die Goldkontakte sind gelb, die Graphen-Doppellagen rot und die Metallbrücke blau eingefärbt. Credit Fabian Geisenhof/Jakob Lenz Usage Restrictions No restrictions. License Public Domain 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.