Spectroscopically selective nanovolume Raman imaging of one single walled carbon nanotube

In this paper, we report on a new procedure to analyze individual single walled carbon nanotube (SWNT), based on an improved use of a confocally selective nanovolume Raman set-up coupled to a refined signal treatment. This technique permits to further improve the resolution in both vertical and lateral dimensions. To acquire spectrally selected SWNT, we registered the spatial distribution of the emitted photons in x,y and z vectors with unprecedented accuracy and were able to resolve details in the specimen with near-field resolution in 3D. The SWNTs are localized with an accuracy better than 17 run in the lateral x,y and better than 2 nm in the z direction. In this letter we report what we believe to be the first evidence of selective nanovolume Raman spectroscopy of carbon nanotubes.