Cornelius Hempel, University of Sydney (IMAGE) University of Sydney Caption This is Dr. Cornelius Hempel at the Sydney Nanoscience Hub, the flagship building of the University of Sydney Nano Institute. Credit Virginia Frey Usage Restrictions For this story only 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.