Fig. 6From: Sulfur-Doped Alkylated Graphene Oxide as High-Performance Lubricant AdditiveThe typical Raman spectrum of SA-GO (which is prepared by the reactions of octadecylamine and the sulfur-doped graphene oxide; the oxidation time of the graphene oxide is 24 h) and GO (the oxidation time of the graphene oxide is 24 h)Back to article page