Spectroscopic and positron lifetime measurements of hydrogenated single walled carbon nanohorns

The hydrogenated and non-hydrogenated single walled carbon nanohorns (SWCNH) are studied. SWCNH with the density of 0.75 g cm−3 showed the maximum differential hydrogen uptake capacities of 1.4 wt.% at 77 K. The temperature Fourier transform infrared (FT-IR) spectra for non-hydrogenated and hydrogenated samples revealed differences in the vibrational mode bands. The hydrogenation of SWCNH hardly affected the positron lifetime spectra. Only small shift of pattern was observed in the X-ray diffraction measurements at 300 K. Obtained results were compared to these for other carbon nanomaterials.