Methods for growing long carbon single-walled nanotubes
US7871591B2 · kind B2 · utility
62Cited by
2References
33Claims
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Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Nov 1, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2202/02
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
Methods and processes for synthesizing single-wall carbon nanotubes are provided. A carbon precursor gas is contacted with metal catalysts deposited on a support material. The metal catalysts are preferably nanoparticles having diameters less than about 3 nm. The reaction temperature is selected such that it is near the eutectic point of the mixture of metal catalyst particles and carbon. Further, the rate at which hydrocarbons are fed into the reactor is equivalent to the rate of formation of carbon SWNTs for given synthesis temperature. The methods produce carbon single-walled nanotubes having longer lengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.