  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.
