N-graphene synthesized in astrochemical ices B. Sivaraman, K. K. Rahul, M. Ambresh, D. Sahu, J. K. Meka, S.-L. Chou, Y.-J. Wu, D. Gupta, A. Das, J.-I. Lo et al. (6 more) Eur. Phys. J. D, 77 2 (2023) 24 Published online: 10 February 2023 DOI: 10.1140/epjd/s10053-023-00590-z