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2014-08-23 - Colloque/Présentation - communication orale - Anglais - 1 page(s)

Struzzi Claudia, Scardamaglia Mattia, Hemberg Axel , Snyders Rony , Bittencourt Carla , "Plasma functionalization of vertically aligned carbon nanotubes" in NanoteC14 Carbon Nanoscience and Nanotechnology, Brussels, Belgium, 2014

  • Codes CREF : Physique des surfaces (DI1265)
  • Unités de recherche UMONS : Chimie des interactions plasma-surface (S882)
Texte intégral :

Abstract(s) :

(Anglais) The recent interest of nanotechnology is devoted to carbon nanostructure because of their characteristic properties (high mechanical strength and electrical and thermal conductivities), but some drawbacks such as chemical inertness must be overcome in order to use these systems as new composite materials. The tuning of their electronic properties by grafting foreign species represents a possible solution because it induces the activation of carbon surface. Among the available methods for chemical functionalization of vertically aligned carbon nanotubes (v-CNTs), we have selected plasma functionalization by using fluorine diluted in argon atmosphere, according to the following ratio Ar:F2 (95:5). We have studied the evolution of the electronic properties of functionalized v-CNTs and the defluorination process upon annealing treatments, and the effect of contaminating oxygen, that was present during the starting plasma process. The modification of the functionalized CNTs properties has been investigated by means of temperature-dependent spectroscopic measurements (X-ray Photoelectron Spectroscopy, XPS, Ultraviolet Photoelectron Spectroscopy, UPS, and Raman Spectroscopy) combined with microscopic studies (Transmission Electron Microscopy, TEM) in order to understand the tuning effects and the structural modifications induced by the plasma to the carbon network and the possible restoring of pristine system after defluorination mechanism.


Mots-clés :
  • (Anglais) spectroscopies
  • (Anglais) Plasma Fluorination
  • (Anglais) carbon nanotubes
  • (Anglais) electronic properties
  • (Anglais) microscopy