A LabRam Horiba spectrometer, equipped with a CCD multichannel detector and two laser sources: one He-Ne laser with a 633 nm line and an Argon laser giving several excitation lines among them 514, 488 adn 457 nm. The system is also equipped with a heating stage which allows us analysis under controlled atmospheres from sub-ambient temperature up to 1800K.
Nowadays, Raman spectroscopy is widely used to characterize SWNT (position, intensity, and widht of the bands depend on the carbon nature). Indeed, information about tube diameter can be obtained; besides it is possible to distinguish between metallic and semiconducting tubes because of the different Raman spectra for semiconducting and metallic SWNT.
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