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Studying the plasma‐assisted polymerization at atmospheric pressure in Ar/TEOS by active laser diagnostics
Author(s) -
Barletta Federica,
Britun Nikolay,
Leys Christophe,
Gherardi Matteo,
Snyders Rony,
Nikiforov Anton
Publication year - 2021
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.202000149
Subject(s) - radical , polymerization , tetraethyl orthosilicate , atmospheric pressure plasma , atmospheric pressure , kinetics , photochemistry , chemistry , plasma , fragmentation (computing) , spectroscopy , analytical chemistry (journal) , organic chemistry , polymer , physics , oceanography , quantum mechanics , computer science , operating system , geology
Abstract The key processes in an atmospheric‐pressure plasma jet containing Ar and tetraethyl orthosilicate (TEOS) are studied by means of two‐dimensional imaging of the important discharge radicals: OH, CH, and atomic O. The kinetics of the species generation is investigated by laser‐induced fluorescence spectroscopy. The work is focused on the behavior of the ground‐state radicals' density as a function of the applied voltage and of the Ar/TEOS mixing ratio. First insights on the physicochemical mechanisms of precursor fragmentation are provided. The influence of precursor admixture and precursor fragmentation on the OH, CH radicals, and atomic oxygen kinetics is revealed. The dominant role of gas‐phase oxidation processes in CH radical formation and polymerization is discussed and analyzed.