| http://www.w3.org/ns/prov#value | - Further, in the method according to (12th) to (27th) inventions of the application, the single-walled carbon nanotubes according to (first) to (11th) inventions can be produced by extremely simple and convenient means of adding an oxidizing agent such as water vapor to the reaction system and, in addition, the multi-walled carbon nanotubes having similar excellent properties can also be produced.
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