Thomaz, R. ; Gutierres, L. I. ; Morais, J. ; Louette, P. ; Severin, D. ; Trautmann, C. ; Pireaux, J. J. ; Papaléo, R. M. (2015)
Oxygen loss induced by swift heavy ions of low and high dE/dx in PMMA thin films.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 365
doi: 10.1016/j.nimb.2015.09.019
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Investigations on the chemical modifications induced by swift heavy ions in PMMA thin films were carried out using beams of high dE/dx (2.2 GeV Bi, 14,090 eV/nm) and low dE/dx (2 MeV H, 19 eV/nm). The induced chemical modifications were monitored by XPS for films with initial thickness of 50 and 100 nm. For both beams, the irradiation decreased the amount of carbon atoms bound to oxygen (C=O and C-O-C), with a larger decrease of the carboxyl moiety, as expected. However, the chemical changes induced by light and heavy ions were qualitatively different. For the same mean deposited energy density, proton irradiation induced a decrease of the relative intensity of the carbon-oxygen bonds up to similar to 20% larger than the irradiation with Bi ions. This suggests a greater importance of particle ejection by unzipping of PMMA chains at high dE/dx, which tends to keep the O/C ratio closer to the pristine value. (C) 2015 Elsevier B.V. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Thomaz, R. ; Gutierres, L. I. ; Morais, J. ; Louette, P. ; Severin, D. ; Trautmann, C. ; Pireaux, J. J. ; Papaléo, R. M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Oxygen loss induced by swift heavy ions of low and high dE/dx in PMMA thin films |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Dezember 2015 |
| Verlag: | Elsevier Science BV, Netherlands |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
| Jahrgang/Volume einer Zeitschrift: | 365 |
| DOI: | 10.1016/j.nimb.2015.09.019 |
| Kurzbeschreibung (Abstract): | Investigations on the chemical modifications induced by swift heavy ions in PMMA thin films were carried out using beams of high dE/dx (2.2 GeV Bi, 14,090 eV/nm) and low dE/dx (2 MeV H, 19 eV/nm). The induced chemical modifications were monitored by XPS for films with initial thickness of 50 and 100 nm. For both beams, the irradiation decreased the amount of carbon atoms bound to oxygen (C=O and C-O-C), with a larger decrease of the carboxyl moiety, as expected. However, the chemical changes induced by light and heavy ions were qualitatively different. For the same mean deposited energy density, proton irradiation induced a decrease of the relative intensity of the carbon-oxygen bonds up to similar to 20% larger than the irradiation with Bi ions. This suggests a greater importance of particle ejection by unzipping of PMMA chains at high dE/dx, which tends to keep the O/C ratio closer to the pristine value. (C) 2015 Elsevier B.V. All rights reserved. |
| Freie Schlagworte: | Polymer thin films, Ion irradiation, Chemical modifications, Depolymerization |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 29 Feb 2016 12:55 |
| Letzte Änderung: | 29 Feb 2016 12:55 |
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