SFG microscopy image of boron nitride monolayer flakes. (IMAGE) Fritz Haber Institute of the Max Planck Society Caption SFG microscopy image of boron nitride monolayer flakes. Credit © FHI Usage Restrictions © FHI 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.