Synthesis of carbon nanostructures by arc evaporation of graphite rods with Co–Ni and YNi 2 catalysts
Yields of single-walled carbon nanotubes (SWNTs) produced from electric arc evaporation of graphite electrodes with 3Co/Ni and YNi 2 catalysts differ substantially. For instance, with YNi 2 catalyst, the SWNT yield is ∼30–50 wt.% in ‘collar’ soot and ∼10–15 wt.% in ‘wall’ soot, while with 3Co/Ni cat...
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Published in | Carbon (New York) Vol. 41; no. 7; pp. 1357 - 1364 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2003
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Subjects | |
Online Access | Get full text |
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Summary: | Yields of single-walled carbon nanotubes (SWNTs) produced from electric arc evaporation of graphite electrodes with 3Co/Ni and YNi
2 catalysts differ substantially. For instance, with YNi
2 catalyst, the SWNT yield is ∼30–50 wt.% in ‘collar’ soot and ∼10–15 wt.% in ‘wall’ soot, while with 3Co/Ni catalyst, the yields are ∼15–20 wt.% and 2–3 wt.%, respectively. According to Raman spectroscopy data, the average dimension of SWNTs is ∼1.2 nm for 3Co/Ni and ∼1.4 nm for YNi
2 catalyst. Optimum conditions for synthesis also differ for catalysts compared; namely, for 3Co/Ni: current intensity is 93 A, helium pressure is 650 Torr, the electrode gap is 2.5–3 mm; for YNi
2: current intensity is 98 A, helium pressure is 500 Torr, the electrode gap is 1–2 mm. |
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ISSN: | 0008-6223 1873-3891 |
DOI: | 10.1016/S0008-6223(03)00060-5 |