Skip to main content
. Author manuscript; available in PMC: 2015 Oct 21.
Published in final edited form as: Nanoscale. 2014 Oct 21;6(20):11744–11755. doi: 10.1039/c4nr03275f

Figure 4.

Figure 4

Comparison of different graphene-based materials as ·OH scavengers. A: EPR spectra of DMPO-OH· adduct formed through 20 min Fenton reaction- in the presence of 200 ppm graphene-based and reference materials. Radical scavenging potency follows rank order: FLG > rGO > GO > mannitol> pC60. Ascorbic acid is a pro-oxidant under these conditions. B: MDA assay showing 100 ppm FLG (red bar, second bar from left) is more active than 100 ppm GO (black bar, first bar from left) in protection of 100 mM deoxyribose from Fenton-generated ·OH oxidation. The right-hand two bars show control experiments that rule out adsorptive artifacts in the FLG experiment. When FLG is added and removed before the oxidation step (green bar, third bar from left), there is no effect (which rules out physical adsorption of deoxyribose). When FLG is added and removed after the oxidation (blue bar, fourth bar from left), there is also no effect (which rules our physical adsorption of the deoxyribose oxidation products).