Determination of the Local Chemical Structure of Graphene Oxide and Reduced Graphene Oxide

Abstract

The local atomic structure of graphene oxide (GO) and reduced annealed graphene oxide (raGO) is determined via ultra‐high‐resolution transmission electron microscopy. We find that the proposed and desired return to graphene from GO is not possible through the synthetic route employed. The detailed structure of GO, previously unknown, is revealed as mottled, with few square nanometer graphitic regions separated by highly oxidized regions.

Monolithic graphene oxide sheets with controllable composition

“…Next, we performed a closer examination of the structure of the GO sheets. Figure 2a presents a typical HR-TEM image that was obtained using aberrationcorrected instruments; the highly graphitic nature of our GO samples was in striking contrast to the structure of chemically synthesized GO 8,31 . The structure of our samples consisted of a highly ordered honeycomb lattice with a grain size of B10 nm, consistent with the value predicted from the Tuinstra-Koenig equation.…”

Chemical functionalization of graphene oxide for improving mechanical and thermal properties of polyurethane composites

“…GO, having the same framework as graphene, contains massive oxygen functional groups such as epoxide, hydroxyl, carboxyl and carbonyl groups located at its edges and basal planes [15]. Hence, GO can be readily dispersed in water and form a stable colloidal suspension due to its strong hydrophilicity [16,17].…”

Highly selective gas sensor arrays based on thermally reduced graphene oxide

“…59 Once it is exposed to air, gas molecules adsorb at different sites in this complex material changing its conductivity, as shown in Fig. 3a.…”