Raman spectroscopy analysis of one SWNT grown on quartz. Spectrum (a) exhibits a G band with a line shape typical of a semiconducting SWNT. Spectrum (b) exhibits a G band showing a mixture of lineshapes typical of semiconducting (blue Lorentzians) and a metallic (red Lorentzians) SWNT behavior. Note that the G′ peak splits in (b) (adapted from [30]).
