Conformation of Ring Type Structures (IMAGE) Princeton University Caption This is the building blocks of graphene, black phosphorus, α-GeSe, and β-GeSe. Credit Cava lab 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.