Navegação Ciências Exatas e da Terra por Autor "Araújo, Leandro Langie"

Resultados 1-7 de 7

    • 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) [Artigo 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 of helium ions in zinc 

      Lantschner, G.H.; Eckardt, J. C.; Lifschitz, A.F.; Arista, Nestor; Araújo, Leandro Langie; Duarte, Patricia Fernanda; Santos, Jose Henrique Rodrigues dos; Behar, Moni; Dias, Johnny Ferraz; Grande, Pedro Luis; Montanari, Claudia C.; Miraglia, Jorge E. (2004) [Artigo de periódico]
      The energy loss of helium ions in zinc has been measured in the energy range from 37.5 to 1750 keV/amu using the transmission technique and the Rutherford backscattering method. In addition, calculations using the extended ...

    • Formation of Ge nanoparticles in SiOxNy by ion implantation and thermal annealing 

      Mirzaei, Sahar; Kremer, Felipe; Sprouster, David J.; Araújo, Leandro Langie; Feng, Ruixing; Glover, C. J.; Ridgway, M.C. (2015) [Artigo de periódico]
      Germanium nanoparticles embedded within dielectric matrices hold much promise for applications in optoelectronic and electronic devices. Here we investigate the formation of Ge nanoparticles in amorphous SiO1.67N0.14 as a ...

    • Lift-off protocols for thin films for use in EXAFS experiments 

      Decoster, S.; Glover, C. J.; Johannessen, B.; Giulian, Raquel; Sprouster, David J.; Kluth, Patrick; Araújo, Leandro Langie; Hussain, Zohair S.; Schnohr, Claudia S.; Salama, H.; Kremer, Felipe; Temst, Kristiaan; Vantomme, A.; Ridgway, M.C. (2013) [Artigo de periódico]
      Lift-off protocols for thin films for improved extended X-ray absorption fine structure (EXAFS) measurements are presented. Using wet chemical etching of the substrate or the interlayer between the thin film and the ...

    • Nano-porosity in GaSb induced by swift heavy ion irradiation 

      Kluth, Patrick; Sullivan, James P.; Li, Weixing; Weed, Ryan; Schnohr, Claudia S.; Giulian, Raquel; Araújo, Leandro Langie; Lei, Wen; Rodriguez, M. D.; Afra, Boshra; Bierschenk, Thomas; Ewing, Rodney C.; Ridgway, M.C. (2014) [Artigo de periódico]
      Nano-porous structures form in GaSb after ion irradiation with 185 MeV Au ions. The porous layer formation is governed by the dominant electronic energy loss at this energy regime. The porous layer morphology differs ...

    • Retenção e evasão em cursos de engenharia : uso de tecnologia para proporcionar a aprendizagem social 

      Canto Filho, Alberto Bastos do; Valle, Edson Cordeiro do; Araújo, Leandro Langie; Pietta, Enzo Victor Zucchetti; Patrício, Laura Gonçalves (2022) [Artigo de periódico]
      Tendo em vista as altas taxas de evasão nos Cursos de Engenharia, principalmente no Brasil, e poucos estudos com propostas efetivamente postas em prática que combatam esse problema, este artigo apresenta e analisa a ...

    • Tracks and voids in amorphous Ge induced by swift heavy-ion irradiation 

      Ridgway, M.C.; Bierschenk, Thomas; Giulian, Raquel; Afra, Boshra; Rodriguez, M. D.; Araújo, Leandro Langie; Byrne, A. P.; Kirby, Nigel; Pakarinen, O. H.; Djurabekova, F.; Nordlund, K.; Schleberger, M.; Osmani, O.; Medvedev, N.; Rethfeld, B.; Kluth, Patrick (2013) [Artigo de periódico]
      Ion tracks formed in amorphous Ge by swift heavy-ion irradiation have been identified with experiment and modeling to yield unambiguous evidence of tracks in an amorphous semiconductor. Their underdense core and overdense ...