Heyong Wang LiU (IMAGE) Linköping University Caption Heyong Wang, Ph.D.-student at Linköping University. Credit Magnus Johansson Usage Restrictions connected to news from LiU 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.