Bond-Breaking Efficiency of High-Energy Ions in Ultrathin Polymer Films

R Thomaz, Pierre Louette, G Hoff, S Müller, J J Pireaux, C Trautmann, R M Papaléo

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Abstract

Thin films of poly(methyl methacrylate) and poly(vinyl chloride) of different thickness are used to investigate the effect of spatial confinement on the efficiency of bond breaking induced by 2 MeV H^{+} and 2.1 GeV Bi ions. Effective cross sections for oxygen and chlorine loss are extracted for films down to a thickness of about 5 nm and are compared to theoretical estimations based on radial energy density profiles simulated with geant-dna. The cross sections are to a large extent thickness independent, indicating that bond breaking is dominated by short-range processes. This is in contrast to the strongly reduced efficiencies found recently for cratering induced by high-energy ions in similar ultrathin polymer films [Phys. Rev. Lett. 114, 118302 (2015)PRLTAO0031-900710.1103/PhysRevLett.114.118302].

Original languageEnglish
Number of pages5
JournalPhysical review letters
Volume121
Issue number6
DOIs
Publication statusPublished - 2018

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polymers
cratering
ions
cross sections
polymethyl methacrylate
chlorine
energy
flux density
chlorides
oxygen
thin films
profiles

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Thomaz, R ; Louette, Pierre ; Hoff, G ; Müller, S ; Pireaux, J J ; Trautmann, C ; Papaléo, R M. / Bond-Breaking Efficiency of High-Energy Ions in Ultrathin Polymer Films. In: Physical review letters. 2018 ; Vol. 121, No. 6.
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Bond-Breaking Efficiency of High-Energy Ions in Ultrathin Polymer Films. / Thomaz, R; Louette, Pierre; Hoff, G; Müller, S; Pireaux, J J; Trautmann, C; Papaléo, R M.

In: Physical review letters, Vol. 121, No. 6, 2018.

Research output: Contribution to journalArticle

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