Raman spectroscopy excels in assessing graphene quality, ... and the π‐electron‐related optical transitions range from the infrared up to the visible range. ... A. V. Ushakov, and S. V. Streltsov, ...

Figure 2. Raman spectra of graphene (red), carbon nanotubes (black), graphite (green), and carbon black (blue). Image Credit: B&W Tek. The spectrum of graphite (green spectrum) is distinguished by an ...

The distinctive infrared spectral fingerprint produced is a signature of the molecular structure of a graphite whisker, which resembles a tiny, rolled-up poster, says Fries.