Tanvi Upreti, Linköping University (IMAGE) Linköping University Caption Tanvi Upreti, doctoral student at the Division for Complex Materials and Devices, who carried out the experiments together with the first author, Guangzheng Zuo. Credit Charlotte Perhammar Usage Restrictions in connection with Linkoping University research 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.