NOVELTY - Producing carbon nanotubes, comprises: (a) combining a metallorganic precursor molecules with an organic hydrocarbon solvent in a mixture; (b) injecting the mixture into a reactor tube (1); (c) transporting the droplets to the tube; (d) partially vaporizing the organic hydrocarbon solvent; (e) transporting the vaporized solvent and metallorganic precursor molecules to second temperature region of tube; (e) thermally decomposing the molecules into metal atoms and carbon atoms; (f) depositing clusters of metal atoms on a surface; and (g) chemically attaching carbon atoms to metal atoms.    USE - The process is useful for producing carbon nanotubes, including any of single-walled carbon nanotubes and MWNT. The carbon nanotubes are useful: for improving the performance of power devices such as thin film polymeric and/or inorganic solar cells, direct-methanol fuel cells, lithium-ion batteries, ultra capacitors, and thermionic power supplies; in biotechnical applications including high sensitivity biochemical and biological sensors, lower cost microarrays for genomic mapping and medical diagnostics, targeted drug delivery systems (including a myriad of related approaches for preparing and dispensing personalized medicines) in vivo photon sources for both diagnostic and photodynamic therapeutic purposes and a range of biomimetic devices such as artificial retinas, neuron replacement and other possibilities; and in complementary metal-oxide-semiconductor imaging devices, wide intensity range photon sensors, and next generation integrated circuits.    ADVANTAGE - The process provides the MWNTs with low defect density and controllable wt.% (less than 5 wt.%) of metal impurity atoms. The process is simple, and provides the product with structural perfection that significantly reduces the extent and cost of post-production processing.    DETAILED DESCRIPTION - Producing carbon nanotubes, comprises: (a) combining a metallorganic precursor molecules, at least one of which comprises at least one carbonyl/phosphine group and at least one ring group, with an organic hydrocarbon solvent in a mixture; (b) injecting the mixture in the form of droplets into a reactor tube (1); (c) transporting the droplets to a first temperature region of the reactor tube: (d) at least partially vaporizing the organic hydrocarbon solvent from the mixture droplets; (e) transporting the vaporized solvent and metallorganic precursor molecules to a second temperature region of the reactor tube which is at a higher temperature than the first region; (e) thermally decomposing the metallorganic precursor molecules into at least metal atoms and carbon atoms; (f) depositing one or more clusters of metal atoms on a surface within the second temperature region; (g) chemically attaching carbon atoms to the metal atoms of the one or more clusters.    DESCRIPTION OF DRAWING(S) - The figure shows the reactor tube.    Reactor tube (1)    Quartz baffles. (2)