Figure 1 (IMAGE) Tohoku University Caption Photoemission electron microscopy (PEEM) and thermal electron emission microscopy (TEEM) images of LaB6 surface coated with graphene (Gr) and hBN. Bright areas in the images indicate a large number of emitted electrons. Credit Hisato Yamaguchi et al. Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.