Abstract
Hydrogenated C60, carbon single‐wall nanotubes (SWNT) and nanofibers (NF) were studied by means of IR transmittance spectroscopy of polycrystalline samples, of powder pressed in KBr pellets (TPKBr) and diffuse reflection (DR). Diffuse reflection was found to be a preferable method. Hydrogenation reduces the high‐frequency conductivity σ of the free carriers by 10 and 30 times in SWNT and NF, respectively, and results in the appearance of a C–H vibrational mode. This mode disappears and σ restores partially after an annealing of the samples at 700°C.
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