Grinding Nanotubes (1 of 2) (image) Rice University Share Print E-Mail Caption Rice University graduate student Mohamad Kabbani grinds nanotubes with a mortar and pestle. A chemical reaction takes place as the altered nanotubes are forced together, unzipping them into graphene nanoribbons. Credit Jeff Fitlow/Rice University Usage Restrictions For news reporting purposes only. 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.