Before continuing the discussion about the Raman spectrum of graphene oxide, let us consider the article by Goldie et al., 2020. "Raman data are usually acquired by using Raman microscopy which couples a Raman spectrometer to an optical microscope, allowing high-magnification visualization of a sample and Raman analysis with a microscopic laser spot. In common with other microscale techniques a single spectrum should not be used to characterize a macroscopic material. While it is common for a representative Raman spectrum of a carbon sample to be reported, this is undesirable because of the variations likely to be present" (Goldie et al., 2020). "Based on the evidence of only one spectrum, this material could be highly oxidized graphite or few-layer graphene, whereas in fact the sample is mostly graphitized carbon. One potential solution adopted by some is to collect multiple spectra from a sample and build a statistically meaningful picture of the material being analyzed" (Goldie et al., 2020). The spectra proposed in the Figure by Goldie et al. is here given by the sketch in the Figure .