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2009-01-01 - Article/Dans un journal avec peer-review - Anglais - 5 page(s)

Felten Alexandre, Ghijsen J., Pireaux Jean-Jacques, Drube W., Johnson R-L., Liang D., Van Tendeloo Gustaaf, Hecq Michel, Bittencourt Carla , "Electronic structure of Pd nanoparticles on carbon nanotubes" in Micron, 40, 1, 74–79

  • Edition : Pergamon Press - An Imprint of Elsevier Science
  • Codes CREF : Chimie des solides (DI1316), Physique des plasmas (DI1233)
  • Unités de recherche UMONS : Chimie des interactions plasma-surface (S882)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) The effect of the oxygen plasma treatment on the electronic states of multi-wall carbon nanotubes (MWCNTs) is analyzed by X-ray photoemission measurements (XPS) and UPS, both using synchrotron radiation. It is found that the plasma treatment effectively grafts oxygen at the CNT-surface. Thereafter, the interaction between evaporated Pd and pristine or oxygen plasma-treated MWCNTs is investigated. Pd is found to nucleate at defective sites, whether initially present or introduced by oxygen plasma treatment. The plasma treatment induced a uniform dispersion of Pd clusters at the CNT-surface. The absence of additional features in the Pd 3d and C 1s core levels spectra testifies that no Pd–C bond is formed. The shift of the Pd 3d core level towards high-binding energy for the smallest clusters is attributed to the Coulomb energy of the charged final state.

Identifiants :
  • DOI : 10.1016/j.micron.2008.01.013