Nanosheets of assembled cubic clusters. (IMAGE) Tokyo Metropolitan University Caption (a) STEM image of an exfoliated sheet. (b) Cross-sectional STEM images of the flaky material. Credit Tokyo Metropolitan University Usage Restrictions Credit must be given to the creator. License CC BY 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.