M. Ramm et al., X-ray photoelectron spectroscopy and near-edge X-ray-absorption fine structure of C-60 polymer films, APPL PHYS A, 70(4), 2000, pp. 387-390
We report core-level and valence-band X-ray photoelectron spectroscopy (XPS
) and carbon K near-edge X-ray-absorption fine structure spectroscopy (NEXA
FS) results of plasma-pnlymerized C-60. In comparison with evaporated C-60
the C 1s peak is broader and asymmetric for the C-60 polymer and its shake-
up satellites diminished. Furthermore, the features of the valence-band as
well as the features of the pi* antibonding orbitals of the C-60 polymer ar
e broader and reduced in intensity, Changes in the electronic structure are
attributed to the polymerization of C-60, the post-plasma functionalizatio
n of the surface by oxygen after exposure to atmosphere, and the occurrence
of amorphous carbon.