Single‐walled carbon nanotube (SWNT) networks have been irradiated with a 12C4+ ion beam (ion energy 23 MeV) to investigate changes to their properties. Measurements of the Raman D‐line show that the irradiation produces structural defects throughout SWNT paper of thickness 40 μm, with a linear increase in defects at the back side of the sample, but a saturating tendency occurring at the front (irradiated) side. The resistance of the samples also increases linearly with irradiation dose. The temperature dependence of the conductivity of the samples is changed progressively by the irradiation: whereas the pristine sample exhibits mixed metallic‐nonmetallic character consistent with the usual model of metallic conduction interrupted by thin barriers through which fluctuation‐assisted tunnelling occurs, the temperature dependence loses its metallic character and follows three‐dimensional variable‐range hopping for the most irradiated sample. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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A new method for continuous production of carbon nanotube (CNT) catalysts is proposed in this study. The method is a modification of the solution combustion synthesis and was called continuous solution combustion synthesis (CSCS). The method consists of the atomization of the modified combustion synthesis precursor solution in a pilot flame. A combustible, like ethanol, is added to the precursor solution to improve the evaporation of the solvent and the atomization. The ignition of the precursor solution is selfsufficient. A fine and porous powder is produced. The powder, collected through an electrostatic precipitator, has superior performance as a carbon nanotube catalyst. When comparing the production of Fe -Mo/MgO catalyst synthesized by the continuous method with the conventional route, it was observed that the amount of carbon nanotubes increased by 52 wt%, and the G/D ratio was also higher.