Plate Mechanical Metamaterials (IMAGE) University of Pennsylvania Caption Even though they are less than 100 nanometers thick, the researchers' plates are strong enough to be picked up by hand and retain their shape after being bent and squeezed. Credit University of Pennsylvania 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.