2-D Atomic Sandwiches (IMAGE) Drexel University Caption A new method for making materials, developed by Drexel University engineers, allows disparate layers of elements to be 'sandwiched' together. Credit Drexel University 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.