Graphene Nanoribbon Illustration (IMAGE) University of Pennsylvania Caption An illustration of a graphene nanoribbon shaped by the beam of a transmission electron microscope. For the first time, researchers from the University of Pennsylvania have used a such a microscope to study the relationship between the atomic geometry of a ribbon of graphene and its electrical properties. Credit Robert Johnson 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.