Foam (1 of 3) (IMAGE) Rice University Caption An electron microscope image of foam created at Rice University shows layers of graphene oxide stacked to form a three-dimensional structure with the help of hexagonal boron nitride linkers. Credit Ajayan Group/Rice 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.