Graphene Enters a Cell (image) Brown University Caption Sharp corners and jagged edges on graphene sheets enable them to puncture cell membranes. An understanding of how graphene interacts with cells could lead to ways of making it that reduces its potential toxicity. Credit Kane Lab / Brown University Usage Restrictions None 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.