Multiwavelength Raman spectroscopy analysis of a large sampling of disordered carbons extracted from the Tore Supra tokamak

Cedric Pardanaud (1) , C. Martin (2, 1) , P. Roubin (1)

1 PIIM - Physique des interactions ioniques et moléculaires
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

Disordered carbon often exhibit a complex Raman spectrum, with four to six components. Here, a large variety of disordered carbons, forming a collection of samples with a great variety of structures, are analysed using multi-wavelength Raman microscopy (325.0, 514.5, 785.0 nm). They allow us to extend Raman behaviour known for nano-crystalline graphite to amorphous carbons, (dependence with the excitation wavelength) and other known for amorphous carbons to nano-crystalline graphite, (differentiation of the smallest cluster size probed using different excitation wavelengths). Experimental spectra were compared to simulated spectra, built using known laws, to evidence a new source of broadening.

Mots clés: Raman spectroscopy; Amorphous carbons; Disordered carbons

Domaines: Chimie-Physique [physics.chem-ph]

Cedric Pardanaud, C. Martin, P. Roubin. Multiwavelength Raman spectroscopy analysis of a large sampling of disordered carbons extracted from the Tore Supra tokamak. Vibrational Spectroscopy, 2014, 70, pp.187-192. ⟨10.1016/j.vibspec.2013.12.004⟩. ⟨hal-00927359⟩