Graphene (IMAGE) American Institute of Physics Caption Graphene etched with an underlying silica substrate produces uneven edges (figure 1) but forms precise edges when placed on boron nitride (figure 2). Credit Guangyu Zhang Usage Restrictions This image may be used only with appropriate caption and 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.