Visualization of defect densities in reduced graphene oxide

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Carbonisation of biomass-derived chars and the thermal reduction of a graphene oxide sample studied using Raman spectroscopy (2013, background): “The significant decrease in IV / IG height ratios due to even mild Raman laser exposure is consistent with the extreme (photo)thermal instability of most of the sp 3 bonded functional groups in graphene oxide materials [63], and their tendency to be removed with exposure to intense light [19, 71].”
A review of dispersion of nanoparticles in cementitious matrices: Nanoparticle geometry perspective (2017, background): “To address this loss, scientists have proposed reducing the GO sheets to reduced-GO (RGO) eradicating the oxygen-containing functional groups [107].”
Influence of the reduction strategy in the synthesis of reduced graphene oxide (2017, background): “FTIR analysis of samples T-RGrO and T-RGO showed that hydroxyl groups were practically removed after the thermal reduction, disappearing completely the broadband occurring at around 3700 cm [38,39].”
High-yield preparation of graphene oxide from small graphite flakes via an improved Hummers method with a simple purification process (2015, background): “The value of ID/IG increases with increasing LD from 1 to about 3 nm (stage 2) followed by a decrease (stage 1, larger than 3 nm) [30].”
Mechanism of graphene oxide formation. (2014, background): “5 nm.(23,24) It is still possible that the bluish centers have slightly fewer functional groups.”