It's a high chemical affinity for oxygen, and it was not discovered in its pure kind until 1823 by Jöns Jakob Berzelius. Graphene growth by thermal decomposition of silicon carbide (SiC) is a way that creates wafer-scale, single-orientation graphene on an insulating substrate. It is commonly often called epigraphene, and https://www.quora.com/profile/Trevor-Flatcher-2/Understanding-the-Chemical-Stability-of-Silicon-Carbide-Special-Ceramics-https-www-macrocosmmaterial-com-news-Underst