Graphene Quantum Dots (IMAGE) Rice University Caption Vials hold solutions with graphene quantum dots that fluoresce in different colors depending on the dots' size. Techniques to produce the dots in specific sizes using coal as a source were developed at Rice University. Credit Tour Group/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.