Analyzing the Raman Spectra of Graphenic Carbon Materials from Kerogens to Nanotubes: What Type of Information Can Be Extracted from Defect Bands?

Pascal Puech (1) , Mariem Kandara (1) , Germercy Paredes (1) , Ludovic Moulin (2) , Elsa Weiss-Hortala (2) , Anirban Kundu (1) , Nicolas Ratel-Ramond (1) , Jérémie-Marie Plewa (1) , Rolland Pellenq (3) , Marc Monthioux (1)

1 CEMES - Centre d'élaboration de matériaux et d'études structurales
2 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement
3 MSE 2 - Multiscale Material Science for Energy and Environment

Considering typical spectra of a broad range of carbonaceous materials from gas-shale to nanotubes, various ways by which defects show up in Raman spectra are exampled and discussed. The position, resonance behavior, and linewidth of both the D and G bands are compared, even if in some cases obtaining accurate information on the materials from the fitting parameters is a difficult task. As a matter of fact, even if a full picture is unreachable, defining parameter trends is one acceptable option. Two ways to determine the linewidth, either graphically and or by fitting are proposed in order to be able to compare literature data. The relationship between the crystallite size obtained from the linewidth and from X-ray diffraction, which is complementary to the Tuinstra and Koenig law, is examined. We show that a single approach is not possible unless modeling is performed and therefore that analysis of Raman spectra should be adapted to the specificities of each sample series, i.e., a minimum of knowledge about the materials is always required.

Mots clés: Raman; crystallite size; carbon; double resonance

Domaines: Sciences de l'ingénieur [physics]

Pascal Puech, Mariem Kandara, Germercy Paredes, Ludovic Moulin, Elsa Weiss-Hortala, et al.. Analyzing the Raman Spectra of Graphenic Carbon Materials from Kerogens to Nanotubes: What Type of Information Can Be Extracted from Defect Bands?. Journal of Carbon Research, 2019, 5 (4 : 69), pp.1-19. ⟨10.3390/c5040069⟩. ⟨hal-02361217⟩