Lattice Structure (IMAGE) Virginia Tech Caption Researchers have developed hierarchical metallic metamaterial with multi-layered, fractal-like 3-D architectures to create structures at centimeter scales incorporating nanoscale features. Credit Jim Stroup/Virginia Tech Usage Restrictions None 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.