Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5396490 | Journal of Electron Spectroscopy and Related Phenomena | 2011 | 5 Pages |
Abstract
â¶ Photon stimulated ion desorption (PSID) measurements at the S K-shell excitation energies were performed on three thiophene-based polymer films, following their NEXAFS spectra. â¶ For poly(thiophene) (PT) and poly(3-methylthiophene) (P3MT) it was found that the S 1s â Ï*, Ï* (S-C) excitation produces S+ desorption efficiently, showing the importance of the resonant Auger process for breaking the C-S bond. â¶ In the case of poly(3-hexylthiophene) (P3HT) S+ desorption seems to be suppressed due to the orientation of 3-hexyl side-chains on the surface. â¶ Desorption ion yield curves for molecular fragments reproduce the photoabsorption spectrum, indicating that the indirect process is here predominant.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
J.R. Santa Rita, C. Arantes, G. Araújo, L.S. Roman, L. Micaroni, M.L.M. Rocco,