Green SiC Substrate at the Bottom with the Graphene Layer on Top Irradiated by Protons (image) American Institute of Physics Share Print E-Mail Caption Green SiC substrate at the bottom with the graphene layer on top irradiated by protons, generating a luminescent defect in the SiC crystal. Credit Maximilian Rühl Usage Restrictions This image may be used only with 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.