A B C G H I L M N S T V Y Z A B C G H I L M N S T V Y Z A B C G H I L M N S T V Y Z Diamond 99.9% – <50nm PDF Galdolinium Oxide (Gd2O3) 99.9+% – <100nm PDF Gold (Au) 99.9% – 20-30nm PDF Graphene 99.5+% – 6-8nm PDF Graphene 99.9% – 11-15nm PDF Graphene Oxide 97+% – <2nm PDF Graphene Oxide 99.9% – 5-15nm PDF Graphite 99.95% – 40-50nm PDF