https://engineering.cmu.edu/news-events/news/2017/08/01-graphene-yang-cohen-karni.html Maybe that? https://pubmed.ncbi.nlm.nih.gov/23059655/ > single-layered graphene shows ultra-high surface area available for efficient molecular loading and bioconjugation, and has been widely explored as novel nano-carriers for drug and gene delivery. Most likely that, though.