Atoms (1 of 2) (IMAGE) University of Vienna Caption Although atoms in graphene can be "seen" by shooting electrons through the material in what is called transmission electron microscopy, different isotopes can appear identical. Credit Copyright: Koponen+Hildén, Creative Commons BY 4.0 Usage Restrictions The image may only be used with appropriate caption or credit. 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.