Hongjie Hu (IMAGE) University of California - San Diego Caption Hongjie Hu, a postdoctoral researcher in the Xu lab at UC San Diego, and co-first author of the study. Credit David Baillot/ UC San Diego Jacobs School of Engineering Usage Restrictions no restrictions with 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.