Isotope engineering in carbon nanotube systems

Details Isotope engineering in carbon nanotube systems Isotope engineering in carbon nanotube systems

2004-06-15

arxiv.org/abs/cond-mat/0406343v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

We report on single-wall carbon nanotube (SWCNT) specific $^{13}$C isotope enrichment. The high temperature annealing of isotope enriched fullerenes encapsulated in SWCNTs yields double-wall carbon nanotubes (DWCNTs) with a high isotope enrichment of the inner wall. The vibrational spectra evidences that no carbon exchange occurs between the two walls. The method facilitates the identification of the Raman signal of the outer and inner tubes. Nuclear magnetic resonance proves the significant contrast of the isotope enriched SWCNTs as compared to other carbon phases, and provides information on the electronic properties of the small diameter inner tubes of the DWCNTs.

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