Hole (image) Vienna University of Technology Share Print E-Mail Caption The projectile penetrates all layers, but only in the top layer, a big hole is created. The graphene below remains intact. Credit TU Wien 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.