Анотація:
The ultrasoft emission spectroscopy method is applied to investigate the energy distribution of
valence electrons in carbon nanofibers and nanotubes. It has been revealed that the width of
emission bands in nanotubes is smaller than that in nanofibers due to the energy redistribution
of valence electrons after the break of bonds when purifying nanotubes from catalysts. It has been
established that the difference between shapes of the emission bands of nanofibers and nanotubes
is a consequence of the appearance of additional mixed π + σ-overlappings in nanotubes.