3D hierarchical MPEA architectures (IMAGE) Songshan Lake Materials Laboratory Caption 3D hierarchical MPEA architectures Credit Jintao Fu, University of Pennsylvania; Wen Chen, University of Massachusetts 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.