Home News Press Releases How to avoid 3.5 billion tons of carbon dioxide per year Publications of Joel Pennings All genres Journal Article (1) Journal Article (1) 1. Journal Article Mischke, J.; Pennings, J.; Weisenseel, E.; Kerger, P.; Rohwerder, M.; Mertin, W.; Bacher, G.: Direct growth of graphene on GaN via plasma-enhanced chemical vapor deposition under N2 atmosphere. 2D Materials 7 (3), 035019 (2020) MPG.PuRe DOI publisher-version