[Zurück]

W.S.M. Werner, F. Helmberger, M. Schürrer, C. Eisenmenger-Sittner, O. Ridzel:
"Measurement of the surface excitation parameter of Kapton, polyethylene (PE), polymethyl methacrylate (PMMA), polystyrene (PS) and polytetrafluoroethylene (PTFE)";
Surface and Interface Analysis, 2022 (2022), S. 1 - 7.

Reflection electron energy loss spectra (REELS) were measured for five insulating
organic compounds: Kapton, polyethylene (PE), poly(methyl methacrylate) (PMMA),
polystyrene (PS) and polytetrafluoroethylene (PTFE), as well as for Ni and Si, in the
energy range between 200 and 1600 eV. The average number of surface excitations
for a single surface crossing were determined from the experimental data and were
found to be considerably smaller than for earlier studied materials, which mainly consisted
of elemental metals [Surf. Sci. 486(2001)L461]. The surface excitation parameter,
a material parameter used to quantify the relative intensity of surface losses in
(photo)electron spectroscopy, was extracted from the data and compared with values
found in the literature. The results indicate that surface excitations only have a minor
influence on quantification of XPS spectra of polymers. On the other hand, a correction
for surface excitations turns out to be essential for measurements of the electron
inelastic mean free path of polymers when a metal is used as reference material.

Kapton, Ni, organic polymers, polyethylene, polymethylmetacrylate, polystyrene, polytetrafluoroethylene, reflection electron energy loss spectroscopy, Si, surface excitation parameter, surface plasmon

http://dx.doi.org/10.1002/sia.7080

https://publik.tuwien.ac.at/files/publik_303514.pdf