Reactive oxygen emission from microwave discharge plasmas

S. Popović, M. Rašković, Spencer Kuo, L. Vušković

Research output: Contribution to journalArticle

Abstract

Metastable oxygen atoms and molecules have received increased interest because of their function in surface modification, bio-decontamination and many other industrial applications, in addition to the role in the upper atmospheric layer chemistry. We review work on production and detection of metastable oxygen and we describe our experiments, including the development of techniques for measurement of metastable molecular oxygen. We show that either metastable oxygen molecules or metastable oxygen atoms can be produced in large quantities in electrical discharges, carefully tailored to promote the required kinetics. Although the two species may coexist, colder discharge regimes favor production of molecules, while at higher temperature conditions atomic oxygen prevails. We found that microwave cavity discharges in He/O2 mixtures favor molecular production, but that an arc-seeded microwave torch in air shows preference of atomic production. Result on the specific yield of molecular oxygen in the microwave cavity discharge shows qualitative agreement with the models.

Original languageEnglish (US)
Article number012013
JournalJournal of Physics: Conference Series
Volume86
Issue number1
DOIs
StatePublished - Jun 1 2007

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plasma jets
microwaves
oxygen
metastable atoms
oxygen atoms
molecules
decontamination
torches
cavities
arcs
chemistry
air
kinetics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Reactive oxygen emission from microwave discharge plasmas. / Popović, S.; Rašković, M.; Kuo, Spencer; Vušković, L.

In: Journal of Physics: Conference Series, Vol. 86, No. 1, 012013, 01.06.2007.

Research output: Contribution to journalArticle

Popović, S. ; Rašković, M. ; Kuo, Spencer ; Vušković, L. / Reactive oxygen emission from microwave discharge plasmas. In: Journal of Physics: Conference Series. 2007 ; Vol. 86, No. 1.
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