Coal (1 of 2) (IMAGE) Rice University Caption An illustration shows the nanostructure of bituminous coal before separation into graphene quantum dots. The Rice University lab of chemist James Tour has developed a method to extract graphene quantum dots in bulk from several types of coal. Credit Tour Group/Rice University 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.