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|Type:||Artigo de evento|
|Title:||Gas-phase And Plasma-surface Reactions In Radiofrequency Discharges Of C2h2-n2-noble Gas Mixtures|
Bica de Moraes M.A.
|Abstract:||Actinometric optical emission spectrometry was used to determine the relative concentrations of the species H, CH, N2 and CN as a function of the ratio of the nitrogen flow rate to the acetylene flow rate in acetylene-nitrogen-helium-argon mixtures. The forms of these concentration functions are discussed in terms of gas-phase molecular fragmentation and plasma/film-surface interactions. In plasmas fed only noble gases, additional experiments revealed the occurrence of plasma/film-surface reactions that produce significant plasma concentrations of the species CN provided that a nitrogenated carbon film was previously deposited in the chamber. In contrast, there is no appreciable concentration of the species CH in plasmas of noble gases in the presence of a-C:H:N films on the chamber walls. © 2001 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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