Isotope engineering of carbon anotube systems

F. Simon, Ch Kramberger, R. Pfeiffer, H. Kuzmany, V. Zólyomi, J. Kürti, P. M. Singer, H. Alloul

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The synthesis of a unique isotope engineered system, double-wall carbon nanotubes with natural carbon outer and highly C13 enriched inner walls, is reported from isotope enriched fullerenes encapsulated in single-wall carbon nanotubes (SWCNTs). The material allows the observation of the D line of the highly defect-free inner tubes that can be related to a curvature induced enhancement of the electron-phonon coupling. Ab initio calculations explain the inhomogeneous broadening of inner tube Raman modes due to the distribution of different isotopes. Nuclear magnetic resonance shows a significant contrast of the isotope enriched inner SWCNTs compared to other carbon phases and provides a macroscopic measure of the inner tube mass content. The high curvature of the small diameter inner tubes manifests in an increased distribution of the chemical shift tensor components.

Original languageEnglish
Article number017401
JournalPhysical review letters
Issue number1
Publication statusPublished - Jul 1 2005


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Simon, F., Kramberger, C., Pfeiffer, R., Kuzmany, H., Zólyomi, V., Kürti, J., Singer, P. M., & Alloul, H. (2005). Isotope engineering of carbon anotube systems. Physical review letters, 95(1), [017401].