Graphene Converts Electronic Signals Extremely Efficiently (IMAGE) Helmholtz-Zentrum Dresden-Rossendorf Caption Graphene converts electronic signals with frequencies in the gigahertz range extremely efficiently into signals with several times higher frequency. Credit Juniks/HZDR 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.