GNR Dragged over Gold Surface (IMAGE) University of Basel Caption A graphen nanoribbon was anchored at the tip of a atomic force microscope and dragged over a gold surface. The observed friction force was extremely low. Credit University of Basel, Department of Physics Usage Restrictions Give adequate 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.