Walsworth Test Gallery (image) University of Maryland Share Print E-Mail Caption Microscope setup for capturing a 2D snapshot of a current in graphene via magnetic field imaging with nitrogen vacancies in diamond. The green light that excites NVs is visible in the image. Credit Mason C. Marshall, Harvard and University of Maryland Usage Restrictions Must carry appropriate credit Share Print E-Mail 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.