Formation of additional amount of water due to functional oxygen group reduction leads to layer delamination. Reduction increases the C/O ratio to 2.8–10.3, decreases C sp 3 content to 11.4–20.3 at% and also the content of C O C and C O groups, accompanied by increasing content of C OH and C OOH groups. All graphene oxide samples show the C/O ratio of 2.1–2.3, 26.5–32.1 at% of C sp 3 bonds and high content of functional oxygen groups (hydroxyl-C OH, epoxy-C O C, carbonyl-C O, carboxyl-C OOH, water) (XPS). In graphene oxide and reduced graphene oxide prepared from the graphite the REELS indicates 8–11 and 7–10 layers. Fityk is a program for nonlinear curve-fitting of analytical functions (especially peak-shaped) to data. The REELS results are consistent with those by the XRD indicating 8 (FL-GOc) and 4 layers (FL-RGOc). Non-linear curve fitting and data analysis. The commercial graphene oxide (FL-GOc) shows a stacking nanostructure of about 22 × 6 nm average diameter by height with the distance of 0.9 nm between 6-7 graphene layers, whereas the respective reduced graphene oxide (FL-RGOc)-about 8 × 1 nm average diameter by height stacking nanostructure with the distance of 0.4 nm between 2-3 graphene layers (XRD). X-ray photoelectron spectroscopy (XPS) and reflection electron energy loss spectroscopy (REELS). It is specialized in fitting peaks (bell-shaped. Fityk is nonlinear curve-fitting and data analysis software. The commercial and synthesised few-layer graphene oxide, prepared using oxidation reactions, and few-layer reduced graphene oxide samples were structurally and chemically investigated by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron spectroscopy methods, i.e. Fityk - The repository has been moved to.
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