Faulty 'Zipping' (IMAGE) Rice University Caption Faulty 'zipping' of polymer-based ribbons can lead to formation of D-loops in graphitic sheets of carbon fibers, according to scientists at Rice University. Credit Nitant Gupta and Evgeni Penev/Rice University Usage Restrictions For news reporting purposes only. 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.