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1.3 PHYSICAL SCIENCES
Individual single-wall carbon nanotubes (SWNT) or small ropes of SWNTs with the same diameter have been characterised by Raman spectroscopy. Highly pure, length-selected SWNTs adsorbed onto substrates designed for surface-enhanced Raman spectroscopy were investigated with a Raman microscope. Various spectra, each with a distinct sharp peak in the radial breathing mode area and four C–C stretching modes could be observed. The modes also showed a strong variation in the relative intensities. In correlation with theoretical predictions this should establish Raman microscopy as a non-destructive nano-technological tool, capable of determining the diameter, symmetry and position of individual SWNTs.
Duesberg, G., Blau, W., Byrne, H., Muster, J., Burghard, M., Roth, S.: Experimental observation of individual single wall nanotube species by Raman microscopy. Chemical Physics Letters, Volume 310, Issues 1-2, Pages 8-14. 27 August, 1999.