A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Core-level XPS spectra of fullerene, highly oriented pyrolitic graphite, and glassy carbon
Tekijät: Leiro JA, Heinonen MH, Laiho T, Batirev IG
Kustantaja: ELSEVIER SCIENCE BV
Julkaisuvuosi: 2003
Lehti:: Journal of Electron Spectroscopy and Related Phenomena
Tietokannassa oleva lehden nimi: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Lehden akronyymi: J ELECTRON SPECTROSC
Vuosikerta: 128
Numero: 2-3
Aloitussivu: 205
Lopetussivu: 213
Sivujen määrä: 9
ISSN: 0368-2048
DOI: https://doi.org/10.1016/S0368-2048(02)00284-0
Tiivistelmä
The C 1s spectra of fullerene C-60, highly oriented pyrolitic graphite (HOPG) and amorphous carbon (a-C) have been measured using X-ray photoemission. The assumed background due to the inelastic scattering of electrons of these spectra has been subtracted by the Tougaard's method. The relative intensities and the energy positions for the core-level satellites have been determined. For C-60, a comparison of the low energy pi type shake-up satellites gives good agreement between theory and experiment. Also, the energies of these features for fullerene and glassy carbon are very similar, whereas the corresponding energies for HOPG are somewhat larger, presumably, because of the higher density of the latter. Moreover, the atomic force microscopy (AFM) study indicates that the C-60 samples consist of a thick layer of large clusters on the Si(111) surface, which is in line with the molecular character of the XPS spectrum. Furthermore, the broad high energy satellite does not consist of a single plasmon but of many components due to collective excitations characteristic of molecules and solids. These features are discussed in the light of theoretical excitation energies. (C) 2002 Elsevier Science B.V. All rights reserved.
The C 1s spectra of fullerene C-60, highly oriented pyrolitic graphite (HOPG) and amorphous carbon (a-C) have been measured using X-ray photoemission. The assumed background due to the inelastic scattering of electrons of these spectra has been subtracted by the Tougaard's method. The relative intensities and the energy positions for the core-level satellites have been determined. For C-60, a comparison of the low energy pi type shake-up satellites gives good agreement between theory and experiment. Also, the energies of these features for fullerene and glassy carbon are very similar, whereas the corresponding energies for HOPG are somewhat larger, presumably, because of the higher density of the latter. Moreover, the atomic force microscopy (AFM) study indicates that the C-60 samples consist of a thick layer of large clusters on the Si(111) surface, which is in line with the molecular character of the XPS spectrum. Furthermore, the broad high energy satellite does not consist of a single plasmon but of many components due to collective excitations characteristic of molecules and solids. These features are discussed in the light of theoretical excitation energies. (C) 2002 Elsevier Science B.V. All rights reserved.
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