Confinement effects of ion tracks in ultrathin polymer films
| Autor: | Ricardo Meurer Papaléo, V. M. de Menezes, R.S. Thomaz, Pedro Luis Grande, Eduardo M. Bringa, Diego Tramontina, L. I. Gutierres, Daniel Severin, Christina Trautmann |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
TRACKS
Materials science ELECTRONIC EXCITATIONS Ciencias Físicas General Physics and Astronomy Nanotechnology Radiation Dinâmica molecular Molecular Dynamics Simulation Molecular physics Ion purl.org/becyt/ford/1 [https] Molecular dynamics Impact crater Filmes finos Polymethyl Methacrylate Filmes poliméricos Heavy Ions Efeitos de feixe iônico chemistry.chemical_classification Ion track POLYMER Polymer purl.org/becyt/ford/1.3 [https] Astronomía chemistry Models Chemical Excited state Nanometre CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1103/PhysRevLett.114.118302 |
| Popis: | We show direct experimental evidence that radiation effects produced by single MeV heavy ions on a polymer surface are weakened when the length of the ion track in the material is confined into layers of a few tens of nanometers. Deviation from the bulk (thick film) behavior of ion-induced craters starts at a critical thickness as large as ∼40nm, due to suppression of long-range additive effects of excited atoms along the track. Good agreement was found between the experimental results, molecular dynamic simulations, and an analytical model. Fil: Papaléo, R. M.. Pontificia Universidade Católica do Rio Grande do Sul; Brasil Fil: Thomaz, R.. Pontificia Universidade Católica do Rio Grande do Sul; Brasil Fil: Gutierres, L.I.. Pontificia Universidade Católica do Rio Grande do Sul; Brasil Fil: De Menezes, V.M.. Universidade Federal Da Fronteira Sul; Brasil Fil: Severin, D.. GSI Helmholtz Centre; Alemania Fil: Trautmann, C.. GSI Helmholtz Centre; Alemania. Universitat Technische Darmstadt; Alemania Fil: Tramontina Videla, Diego Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Bringa, Eduardo Marcial. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Grande, P. L.. Universidade Federal do Rio Grande do Sul; Brasil |
| Databáze: | OpenAIRE |
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