Janus nanosheets rolled into nanoscrolls. (IMAGE) Tokyo Metropolitan University Caption By replacing the atoms on one side of the nanosheet with a different element, the team have realized a nanosheet that can spontaneously roll into a scroll when detached from its substrate. Credit Tokyo Metropolitan University Usage Restrictions Please give credit for use. 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.