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Hiroki Ago,Satoshi Ohshima,Kazuhito Tsukuagoshi,Masaharu Tsuji,Motoo Yumura 한국물리학회 2005 Current Applied Physics Vol.5 No.2
Single- and multi-wall carbon nanotubes have been synthesized by the gas-phase catalytic reaction of colloidal solutions of metalnanoparticles using a vertical ow reactor. The reverse micelle solution of the CoMo nanoparticles with the mean diameter of 11nm dissolved in toluene was injected directly into the reactor maintained at 1200.C. The nanoparticles and the solvent act as thecatalyst and carbon source, respectively. When the concentration of the thiophene additive is low (1 wt.%), the formation of SWNTbundles preferentially occurred. The SWNT bundles were present together with the relatively small metal nanoparticles with thediameter of 0.55.5 nm. It is likely that the original nanoparticles with the diameter of 11 nm break into smaller ones, 12 nm dia-meters, which is suitable for the SWNT growth. The synactic eect of Co and Mo was also observed.. 2004 Elsevier B.V. All rights reserved.PACS:81.07.De