Figure 2: A typical measured Raman spectrum of our graphene revealing two distinct peaks.
From: In-situ Raman spectroscopy to elucidate the influence of adsorption in graphene electrochemistry

the G-peak and the 2D-peak. In the Raman spectroelectrochemistry experiments both peak positions are changing when electrode voltages are applied. In analysis of these experiments, the G-peak position is displayed next to the recorded cyclic voltammograms.