Synthesis of small and narrow diameter distributed carbon single walled nanotubes
OwnerAvetik Harutyunyan, Elena Fernandez +1inventors
InventorsAvetik Harutyunyan, Elena Fernandez, Toshio Tokune
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Abstract
Method and processes for synthesizing single-wall carbon nanotubes is provided. A carbon precursor gas is contacted with metal deposited on a support material. The metal catalysts are preferably nanoparticles having diameters less than about 50 nm. The reaction temperature is selected such that it is near the eutectic point of the mixture of metal catalyst particles and carbon.
Claims50
A chemical vapor deposition method for the preparation of single-wall carbon nanotubes (SWNT), the method comprising:
- contacting a carbon precursor gas with a catalyst on a support at a temperature near the eutectic point of the catalyst wherein SWNT having narrow distribution of diameters are formed.
A chemical vapor deposition method for the preparation of single-wall carbon nanotubes (SWNT), the method comprising:
- contacting a carbon precursor gas with a catalyst on a support at a temperature less than the melting point of the catalyst and about 5° C. to about 150° C. above the eutectic point of the catalyst wherein SWNT are formed.
A single-wall carbon nanotube (SWNT) produced by the process of:
- contacting a carbon precursor gas with a catalyst on a support selected from the group consisting of Al2O3, SiO3, MgO and zeolite;
- and
- maintaining reaction temperature between the melting point of the catalyst and the eutectic point of the catalyst.
The process of claim 50, wherein the temperature is about 1:10 to about 1:20.
Dependencies are inferred from the claim text.