Patent ID: 7713509

Claim:
A method of forming nitrogen-doped single-walled nanotubes (SWNTs) comprising: forming a catalyst metal layer on a substrate; loading the substrate having the catalyst metal layer into a reaction chamber; forming an H 2 O plasma atmosphere in the reaction chamber; forming the nitrogen-doped carbon nanotubes on the catalyst metal layer by supplying a carbon precursor and a nitrogen precursor into the reaction chamber where a chemical reaction therebetween is generated in the H 2 O plasma atmosphere, and controlling the carbon precursor and the nitrogen precursor to supply at a flow rate of equal to or less than ⅙M of nitrogen atom per about 1M of carbon atom, wherein an inner side of the reaction chamber is maintained at a temperature in a range of between about 400° C. and about 600° C. while the nitrogen-doped single-walled nanotubes are formed.