Raman spectra of virgin and damaged graphite edge planes Original Research Article

First-order Raman spectra of virgin and ion irradiated highly oriented pyrolytic graphite were performed along the basal and edge planes. Ion irradiation was performed in the low fluence regime (≈ 1012–1013 ions cm−2) using a 400 keV Ar+ beam in order to a introduce controlled amount of defects in the structure. Virgin edge Raman spectra reveal the presence of a 1351 cm−1 structure (D∗) shifted 10 cm−1 away from the disorder induced D-line found upon irradiating or grinding the graphite surface.