Method for producing carbon nanotubes
US6455021B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Jul 20, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/844
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
The method of the present invention deposits carbon nanotubes by contacting carbon vapor with a non-magnetic transition metal including at least two elements selected from the group consisting of ruthenium, rhodium, palladium, and platinum. For example, carbon vapor and particulates of the non-magnetic transition metal are generated by arc discharge between a rod-shaped anode containing carbon and the non-magnetic transition metal, and a rod-shaped cathode opposing to the anode, and carbon nanotubes are deposited on a base portion of the cathode. The arc discharge is performed in a reactor chamber containing inert gas or the mixture of inert gas and hydrogen gas, at a pressure ranging from 50 to 1500 Torr.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.