Artículos de revistas
Confinement effects of ion tracks in ultrathin polymer films
Fecha
2015-03Registro en:
Papaléo, R. M.; Thomaz, R.; Gutierres, L.I.; De Menezes, V.M.; Severin, D.; et al.; Confinement effects of ion tracks in ultrathin polymer films; American Physical Society; Physical Review Letters; 114; 11; 3-2015; 118302-118306
0031-9007
CONICET Digital
CONICET
Autor
Papaléo, R. M.
Thomaz, R.
Gutierres, L.I.
De Menezes, V.M.
Severin, D.
Trautmann, C.
Tramontina Videla, Diego Ramiro
Bringa, Eduardo Marcial
Grande, P. L.
Resumen
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.