Listar Ciencias Exactas y Naturales por tema "Impacto ion-superfície"

Mostrando ítems 1-6 de 6

    • Composition, atomic transport, and chemical stability of ZrAl/sub x/O/sub y/ ultrathin films deposited on Si(001) 

      Morais, Jonder; Rosa, Elisa Brod Oliveira da; Pezzi, Rafael Peretti; Miotti, Leonardo; Baumvol, Israel Jacob Rabin (2001) [Artículo de periódico]
      The stability of a ZrAlxOy film sputtered on Si upon thermal annealing in vacuum or in O2 was investigated. X-ray diffraction indicated that the as-deposited film was amorphous and remained so after annealing. Rutherford ...

    • Electronic energy loss of channeled ions : the giant Barkas effect 

      Araújo, Leandro Langie; Grande, Pedro Luis; Behar, Moni; Dias, Johnny Ferraz; Lifschitz, A.F.; Arista, Nestor; Schiwietz, Gregor (2004) [Artículo de periódico]
      In this work we have measured the electronic energy loss of ⁹Be and ¹¹B ions for the ‹100› and ‹110› directions in Si as a function of the incident ion energy. The channeling measurements cover a wide energy range between ...

    • Energy loss in medium-energy ion scattering : a combined theoretical and experimental study of the model system Y on Si(111) 

      Muñoz-Marques, M. A.; Parkinson, Gareth; Woodruff, D. P.; Silva Junior, Agenor Hentz da; Grande, Pedro Luis; Schwietz, Gregor; Wood, Tim J.; Bonet, Chris; Tear, Steve P.; Bailey, Paul; Noakes, Tim C. Q. (2005) [Artículo de periódico]
      The energy-loss spectrum associated with scattering of 100 keV H+ ions from Y atoms on Si (111) has been investigated both experimentally and theoretically. Measurements were made from Y overlayers, and from the Si (111) ...

    • High-resolution depth profiling in ultrathin Al/sub 2/O/sub 3/ films on Si 

      Gusev, Evgeni P.; Copel, Matthew; Cartier, Eduard; Baumvol, Israel Jacob Rabin; Krug, Cristiano; Gribelyuk, M.A. (2000) [Artículo de periódico]
      A combination of two complementary depth profiling techniques with sub-nm depth resolution, nuclear resonance profiling and medium energy ion scattering, and cross-sectional high-resolution transmission electron microscopy ...

    • Observation of collective inner-shell effects for protons backscattered from the Al(110) surface 

      Grande, Pedro Luis; Silva Junior, Agenor Hentz da; Schiwietz, Gregor; Starodub, D.; Garfunkel, E.; Gustafsson, T. (2005) [Artículo de periódico]
      The surface peak of 98-keV protons backscattered from a clean Al (110) surface has been studied in detail for three different scattering geometries. The corresponding energy-loss distributions are asymmetric due to the ...

    • Probing thermomechanical behavior of polymers at the nanometer scale with single-ion bombardment and scanning force microscopy 

      Papaleo, Ricardo Meurer; Oliveira, Luciano Denardin de; Farenzena, Lucio Sartori; Araujo, Marco Aurelio de; Livi, Rogerio Pohlmann (2000) [Artículo de periódico]
      Features produced by swift heavy ions on polymer thin films at different temperatures are used to identify the transition between vitreous and viscoelastic behaviors (the glass transition temperature) and to probe the ...