Electronic structure of hydrogenated carbon nanotubes studied by core level spectroscopy

The high-resolution near edge X-ray absorption fine structure spectroscopy and X-ray photoelectron spectroscopy were used to elucidate the nature of chemical bonding between carbon and hydrogen atoms on the surface and inside hydrogenated single-walled carbon nanotubes (H-SWNTs). The measured spectra showed formation of chemical bonding between the hydrogen and carbon atoms in H-SWNTs. In order to obtain a detailed understanding origin of the chemical bond between C and H atoms, density functional calculations and theoretical analysis of experimental NEXAFS spectra were carried out.