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The effects of temperature, reaction time, and flow rate on the structure of carbon nanotubes (CNTs) were studied using catalytic chemical vapor deposition of methane over an Fe-Mo/Al 2 O 3 catalyst. Results show that the temperature is a key parameter to control the wall thickness of the CNTs. Low temperature leads to the formation of multiwalled carbon nanotubes (MWCNTs) with wall...
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