Papers by Author: Thierry Belmonte

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Authors: M. Mafra, Thierry Belmonte, A.M. Maliska, A.S. da Silva Sobrinho, U. Cvelbar, F. Poncin-Epaillard
Abstract: Characterization of the interaction between an argon-oxygen post-discharge and hexatriacontane (C36H74) is carried out. Optical emission spectroscopy using the atmospheric band O2 (b1Σg +, v=0  X3Σg −, v’=0) at 760 nm gives simultaneously the evolution of the O(3P) concentration above the surface and the gas temperature by simulation of the rotational spectrum of the transition. Surface reactions contribute to the heating in the sample and to a substantial increase in the gas temperature. Finally, a strong correlation between the time evolutions of the transition intensity and the sample temperature is observed, suggesting that O(3P) is the main reactive species that produces the heating and the chemical changes in the HTC.
Authors: L. Lefèvre, Thierry Belmonte, Thierry Czerwiec, Alain Ricard, Henri Michel
Authors: B. Gaillard-Allemand, Michel Vilasi, Thierry Belmonte, C. Rives, Thierry Czerwiec, F. Belnet, O. Kerrec, Henri Michel
Authors: E.A. Bernardelli, T. Souza, A.M. Maliska, Thierry Belmonte, M. Mafra
Abstract: Stearic acid is treated in a DC Ar-O2 plasma created by a cathode-anode confined system. The influence of the most important process parameters (gas flow rate, sample temperature, output power and exposure time) on the acid modification is studied. The evaluation of the influence of these parameters on grafting and etching of stearic acid was done by measuring the mass variation rate (MVR). The results show that when charged and chemically active species increase in density, what is directly connected with plasma parameters, the MVR increases too. In all experimental conditions, a negative MVR was obtained, due to the etching of the sample. The etching rate decreases with processing time, probably because of the formation of a product which is more resistant to plasma etching.
Authors: Thierry Belmonte, A. Daniel, T. Duguet
Abstract: After reviewing most of the recent developments performed on hybrid processes, basic physical phenomena of PVD-PECVD processes are detailed with the help of a model showing the different influences of main process parameters. Ti-Si-O and Zn-Si-O thin films are synthesized as possible examples of composite thin films. Limitations of the model developed are also discussed with respect to the composition and structure of deposited thin films.
Authors: B. Gaillard-Allemand, Michel Vilasi, Thierry Belmonte, J. Steinmetz
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