Tiankai Zhang, Feng Gao and Feng Wang (IMAGE) Linköping University Caption Researchers at Linköping University – Tiankai Zhang, Feng Gao and Feng Wang. Credit Anna Nilsen Usage Restrictions Please use appropriate caption and credit. License Original 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.