EM image of experimental device (IMAGE) University of Groningen Caption This EM image of an experimental device as used in this study shows graphene (light green) with boron nitride (blue) on top. Measurements were made across the orange lines. Credit S. Omar, University of Groningen Usage Restrictions With credit 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.