Graphene Sensitizers, Space-filling Models (image) Indiana University Share Print E-Mail Caption Two graphene molecules (dark grey) are caged by sidegroups (blue) attached to each graphene sheet. The sidegroups help prevent the graphene sheets from stacking, as they are prone to do. Credit Image by Liang-shi Li Usage Restrictions None Share Print E-Mail 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.