To distinguish fullerene C 60 nanotubes and C 60 nanowhiskers using Raman spectroscopy

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Raman spectroscopic measurements were carried out for fullerene C 60 nanotubes (FNTs) and nanowhiskers (FNWs) with a laser of 514 nm at power density of 20 mW/mm 2 in their solution and air-dried states. It is found that the Raman spectroscopic features of FNWs are very similar to those of FNTs in the solution. However, the Raman peak of pentagonal pinch mode A g(2) of the C 60 was quite different between the air-dried FNTs and FNWs upon laser irradiation. The Raman results implied that compared to the FNWs, the FNTs were more easily transformed to a glassy graphitic phase under the laser irradiation in air atmosphere.