Spectroscopic study of carbon nanotubes

Seamus Curran; Declan N. Weldon; Werner J. Blau; Henny W. Zandbergen; J. Kastner; Hans Kuzmany

doi:10.1117/12.196134

28 November 1994 Spectroscopic study of carbon nanotubes

Seamus Curran, Declan N. Weldon, Werner J. Blau, Henny W. Zandbergen, J. Kastner, Hans Kuzmany

Proceedings Volume 2284, Fullerenes and Photonics; (1994) https://doi.org/10.1117/12.196134
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

We present a comprehensive experimental study of the vibrational spectra of nanotubes. There are two main lines observed in the Raman spectrum, one positioned at 1350 cm^-1, the D line, and the other at 1580 cm^-1, the G line. Both these lines are very similar to those seen with disordered graphite. The disorder induced D line is very weak compared to the G line which is indicative of high crystalline materials. The position and intensity of the D line strongly depends on the energy of the exciting laser. This dispersion effect was also observed for graphitic particles and may be explained by a photoselective resonance process of nanotubes with different sizes. There are two optically active modes in the Infrared spectrum for highly orientated polycrystalline graphite which are the E_1u and A_2u modes. The E_1u mode is positioned at 1587 cm^-1 while the A_2u mode is positioned at 868 cm^-1. The Infrared spectrum of the nanotubes shows both modes although the E_1u mode is downshifted to 1575 cm^-1.

Citation Download Citation

Seamus Curran, Declan N. Weldon, Werner J. Blau, Henny W. Zandbergen, J. Kastner, and Hans Kuzmany "Spectroscopic study of carbon nanotubes", Proc. SPIE 2284, Fullerenes and Photonics, (28 November 1994); https://doi.org/10.1117/12.196134

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