Graphene Defect Image (IMAGE) DOE/Oak Ridge National Laboratory Caption Computer simulations show a single proton (pink) can cross graphene by passing through the world's thinnest proton channel. Credit Image courtesy of Franz Geiger, Northwestern University 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.