Raman spectra of virgin and damaged graphite edge planes |
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Authors: | G Compagnini O Puglisi G Foti |
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Affiliation: | aDipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, 6-95125 Catania, Italy;bDipartimento di Fisica, Università di Catania, Corso Italia, 57-95129 Catania, Italy |
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Abstract: | 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.The 1351 cm−1 D* structure is then considered as the feature coming from the rupture of the D6h4 space group symmetry. A comparison between D* and the classical 1360 cm−1 D-line is discussed in terms of induced disorder. |
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Keywords: | A Highly oriented graphite B surface treatment C Raman spectroscopy D radiation damage |
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