| Autor: |
KIANG, C.-H., VAN LOOSDRECHT, P.H.M., BEYERS, R., SALEM, J.R., BETHUNE, D.S., GODDARD III, W.A., DORN, H.C., BURBANK, P., STEVENSON, S. |
| Zdroj: |
Surface Review & Letters; Feb1996, Vol. 3 Issue 1, p765-769, 5p |
| Abstrakt: |
By covaporizing metals with carbon in a fullerene generator, diverse fullerene-related structures can be produced. Adding cobalt to the graphite anode leads to the production of single-layer carbon nanotubes. We find that the relative abundance of tubes with different diameters can be successfully altered by the presence of various catalyst promoters such as sulfur, bismuth, or lead. If Sc is covaporized in the arc, many Sc-containing metallofullerenes form abundantly. Purified 3@82 has been obtained by HPLC techniques, and its dynamics have been investigated using electron paramagnetic resonance spectroscopy. The unusually large, strongly temperature-dependent linewidths and the temperature-dependent hyperfine coupling suggest that the Sc atoms form a trimer which rapidly reorients within the 82 cage. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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