Figure 4
From: Controlled Sonication as a Route to in-situ Graphene Flake Size Control

(a) Normalised Raman spectra of graphene dispersions produced at the maxima and minima of the ICD range. (b) The ID/IG ratio as a function of the square root of the ICD. The uncertainty in the ID/IG ratio and the ICD is associated with the standard deviation of three Raman measurements and five broadband energy measurements per sample, respectively.