Copper (IMAGE) University of California - Riverside Caption From left, this shows: (1) copper before any processing, (2) copper after thermal processing; (3) copper after adding graphene. Credit UC Riverside 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.