Catalyst for the growth of carbon single-walled nanotubes
US8163263B2 · kind B2 · utility
9Cited by
11References
15Claims
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Key dates
| Filing date | Jan 30, 2007 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Jun 2, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/843
- WIPO fieldChemical engineering
- 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 at which the hydrocarbons react 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.