Process for preparing carbon nanotubes
US6887451B2 · kind B2 · utility
44Cited by
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15Claims
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Key dates
| Filing date | Apr 30, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | May 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/843
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Carbon nanotubes are produced using a silane procedure, in which a substrate such as carbon paper or stainless steel mesh is immersed in a silane solution of a metal catalyst, preferable Co:Ni in a 1:1 ratio; and a feedstock gas containing a carbon source such as ethylene is fed through the substrate and the catalyst deposited thereon while the substrate is heated by applying an electrical current thereto. Thus, a reaction occurs between the catalyst and the gas to yield carbon nanotubes supported on the conductive substrate. These composite electrodes may be used in electrochemistry or in field emitting applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.