Large and Very High-Quality hBN Crystals (IMAGE) Graphene Flagship Caption Graphene Flagship researchers reported a significant step forward in growing monoisotopic hexagonal boron nitride at atmospheric pressure for the production of large and very high-quality crystals. Credit Graphene Flagship 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.