Evidence for surface oxidation on Pyrex of NO into NO<SUB>2</SUB> by adsorbed O atoms - Laboratoire de Physique des Plasmas (LPP) Accéder directement au contenu
Article Dans Une Revue Plasma Sources Science and Technology Année : 2010

Evidence for surface oxidation on Pyrex of NO into NO2 by adsorbed O atoms

Olivier Guaitella
M. Hübner
  • Fonction : Auteur
S. Welzel
  • Fonction : Auteur
J. Röpcke
  • Fonction : Auteur
Antoine Rousseau

Résumé

The surface of a Pyrex discharge tube was treated by a capacitively coupled RF plasma at low pressure. In cases where the plasma contained oxygen, O atoms deposition on the tube surface could be confirmed via the time-dependent conversion of NO to NO2 in a post-plasma experiment. Inside the discharge tube, the evolution of the concentrations of NO and of NO2 was measured using quantum cascade laser absorption spectroscopy in the mid-infrared spectral range. The surface density of atomic oxygen was estimated to be about 2 × 1014 cm−2 based on NO oxidation in the closed reactor. The production rate of NO2 is in the range of 2 × 1011 molecules cm−3 s−1.

Dates et versions

hal-01549469 , version 1 (28-06-2017)

Identifiants

Citer

Olivier Guaitella, M. Hübner, S. Welzel, Daniil Marinov, J. Röpcke, et al.. Evidence for surface oxidation on Pyrex of NO into NO2 by adsorbed O atoms. Plasma Sources Science and Technology, 2010, 19, pp.045026. ⟨10.1088/0963-0252/19/4/045026⟩. ⟨hal-01549469⟩
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