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High pressure Raman spectroscopy in carbon nanotubes

Gerasimos A. Kourouklis 1John Arvanitidis 1,2Dimitris Christofilos 1Sotirios Ves 3

1. Aristotle University, Physics Division, School of Technology, University Campus, Thessaloniki 54124, Greece
2. Technological Educational Institute of Thessaloniki, Department of Applied Sciences, Sindos, Thessaloniki 57400, Greece
3. Dept. of Physics, Aristotle University of Thessaloniki, 54 124 Thessaloniki, Greece, Thessaloniki 54 124, Greece

Abstract

This work focuses on the high pressure Raman study of carbon nanotube structures comprising of single or multiwall tubes. The detailed examination of the Raman peaks as a function of pressure, especially those attributed to the radial breathing modes (RBM) of the inner and outer tubes of the structure, provides a wealth of information concerning the pressure response of individual nanotubes as well as the inner-outer tube (intratube) interactions. The pressure response of the inner tubes, expressed by the normalized pressure slopes γi= (1/ωi) (δωi/δP) vs. frequency of their RBMs, shows a remarkable grouping in quasi-linear distributions wherein Gi increases with w. This behaviour is explained by assuming that the pressure response of an internal tube is strongly dependent on the intratube spacings and thus the structural characteristics of the encapsulating tube. This information is of particular interest for the characterization of carbon nanotubes as well as in evaluating the encapsulation effects on systems incorporated in these structures.

 

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Related papers

Presentation: Invited oral at E-MRS Fall Meeting 2008, Symposium A, by Gerasimos A. Kourouklis
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-06-11 21:21
Revised:   2009-06-07 00:48