Production of carbon nanoparticles, e.g. nanotubes or nanofibers, comprises adding catalyst or thermally decomposable catalyst precursor to heated reactor, maintaining fluidized bed of particles in reactor, and forming carbon nanoparticles

NOVELTY - Production of carbon nanoparticles, comprise passing gaseous carbon source through heated reactor; adding catalyst supported on substrate particles or thermally decomposable catalyst precursor supported on substrate particles to the heated reactor; maintaining fluidized bed (34) of substrate particles in heated reactor; and forming carbon nanoparticles in heated reactor. USE - The method is for producing carbon nanoparticles, which are nanotubes and/or nanofibers. The nanotubes are single-walled nanotubes or multi-walled nanotubes (all claimed). ADVANTAGE - The method is performed in low cost and scalability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for carbon nanoparticles produced by the method.