Abstract
Boron carbide nanorods were prepared on a large scale directly from the reaction of carbon nanotubes with boron powder at 1150 °C. The bent carbon nanotubes transform into straight nanorods during the reaction. The atomic ratio of B to C in the nanorods is very close to 4 ∶ 1, corresponding to the compound B4C. Carbon nanotubes act here as templates at the beginning of the formation and as a carbon source for the growth of the boron carbide nanorods.
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