Nano-Plate Balanced on a Flower Petal (IMAGE) University of Pennsylvania Caption The plates' corrugation allow them to remain stiff and stable without the addition of a heavy frame or backing. 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.