Fig. 8From: Sulfur-Doped Alkylated Graphene Oxide as High-Performance Lubricant AdditiveThe average diameter of wear scar while the SA-GO (prepared by sulfur-doped GO and butylamine, octylamine, laurylamine, and octadecylamine; the oxidation time of the GO is 24 h) is applied as lubrication additive in PAO4 (a) and 928 (b) oilsBack to article page