Raman microscopy on individual single wall nanotube species

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Log Number: 50 Abstract Submitted to the

Raman microscopy on individual single wall nanotube species

G. S. Duesberg^*, H. J. Byrne^**, J. Muster^***, M. Burghard^***, W. Blau^* and S. Roth^***

^* Physics Dept., Trinity College Dublin, Dublin 2, Ireland
^** School of Physics, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland
^*** Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, 70569 Stuttgart, Germany
Contact e-mail: duesberg@klizix.mpi-stuttgart.mpg.de

Raman Microscopy has been performed on single wall carbon nanotubes (SWNTs). Chromatographically purified SWNTs were adsorbed onto glass or substrates for Surface Enhanced Raman Spectroscopy. Spectra with a distinct sharp peak in the region of the radial breathing mode (RBM) and four resolved C-C stretching modes centred at 1580 cm^-1 were recorded. Atomic Force Microscopy on the same substrates revealed, that there are only a few objects in the Raman active area. The extremely narrow line width also indicates that the spectra originate from individual SWNTs or ropes made of SWNTs with a unique diameter. From the position of the RBM we estimated the diameter of the corresponding tubes. The experiment demonstrates that Raman microscopy can be used as a nanotechnical tool for the characterisation of SWNTs and allows detailed verification of the theoretical predictions.

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