dias-illustration (IMAGE) University of Rochester Caption This illustration from the Dias lab shows hydrogen molecules, at top, diffusing into a thin layer of palladium (purple), where they are separated into individual atoms, which then are distributed in an underlying layer of yttrium. Credit Ranga Dias lab/University of Rochester Usage Restrictions credit: Ranga Dias lab/University of Rochester 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.