Graphene Ribbons (IMAGE) Columbia University Caption A curved graphene ribbon, illustrated in grey, shown laid flat against another graphene sheet. There is a continuous change in the twist angle between the ribbon above and the sheet below. In some places the atomic lattices of the two sheets line up at a 0° angle to each other, while in others, they are twisted relative to each other by as much as 5°. Credit Cory Dean, Columbia University Usage Restrictions Re-use with credit License Original 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.