The article "The Raman Fingerprint of Graphene" by Ferrari et al. explores the unique electronic structure of graphene, a two-dimensional carbon allotrope, as captured in its Raman spectrum. The authors demonstrate that the Raman spectrum evolves with the number of layers in graphene, providing a clear fingerprint for single-, bi-, and few-layer graphene. This fingerprint reflects changes in the electronic structure and electron-phonon interactions, enabling unambiguous, high-throughput, and non-destructive identification of graphene layers. The study uses micromechanical cleavage to prepare graphene samples and combines Raman spectroscopy with Transmission Electron Microscopy (TEM) for definitive identification. The Raman spectra show distinct features such as the G peak and the 2D peak, which differ significantly between graphene and bulk graphite. The 2D peak in graphene is a single sharp peak, while in bulk graphite, it consists of two components. The article also explains the splitting of the 2D peak in bi-layer graphene due to the interaction of the $\pi$ and $\pi^*$ bands, leading to four distinct peaks. This research highlights the potential of Raman spectroscopy for characterizing graphene and its derivatives in various applications.The article "The Raman Fingerprint of Graphene" by Ferrari et al. explores the unique electronic structure of graphene, a two-dimensional carbon allotrope, as captured in its Raman spectrum. The authors demonstrate that the Raman spectrum evolves with the number of layers in graphene, providing a clear fingerprint for single-, bi-, and few-layer graphene. This fingerprint reflects changes in the electronic structure and electron-phonon interactions, enabling unambiguous, high-throughput, and non-destructive identification of graphene layers. The study uses micromechanical cleavage to prepare graphene samples and combines Raman spectroscopy with Transmission Electron Microscopy (TEM) for definitive identification. The Raman spectra show distinct features such as the G peak and the 2D peak, which differ significantly between graphene and bulk graphite. The 2D peak in graphene is a single sharp peak, while in bulk graphite, it consists of two components. The article also explains the splitting of the 2D peak in bi-layer graphene due to the interaction of the $\pi$ and $\pi^*$ bands, leading to four distinct peaks. This research highlights the potential of Raman spectroscopy for characterizing graphene and its derivatives in various applications.