Eur. Phys. J. Appl. Phys.
Volume 47, Number 2, August 200911th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI)
|Number of page(s)||7|
|Section||11th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI)|
|Published online||05 June 2009|
Atmospheric pressure generation of O2(a1Δg) by microplasmas
Laboratoire de Physique des Gaz et des Plasmas, UMR 8578 CNRS/Université Paris-Sud, Bât. 210, 91405 Orsay, France
2 Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
3 Laboratoire des Techniques de la Microélectronique, UMR 5129 CNRS/Université Joseph Fourier/INPG, 17 av. des Martyrs, 38054 Grenoble, France
Corresponding author: email@example.com
Accepted: 6 April 2009
Published online: 5 June 2009
The generation of singlet delta oxygen states (O2(a1Δg)) by microplasmas has been studied experimentally. In the present paper, it is shown that micro-cathode sustained discharges (MCSD's) can be used to produce high fluxes of O2(a1Δg) at atmospheric pressure. In He/O2/NO mixtures, O2(a1Δg) number densities higher than 1016 cm−3 can be generated by this 3-electrode configuration and transported over distances of some tens of cm. In fact, at total flow rates up to 30 ln/min, O2(a1Δg) fluxes above 10 mmol/h were measured in the MCSD afterglow, at 26 cm downstream. As a result, MCSD's appear to be very efficient and suitable tools for the continuous production of large amounts of O2(a1Δg) at atmospheric pressure, which could give rise to a wide range of new applications, namely biological. The effect of different parameters such as gas flows and mixtures, and discharge current are discussed in the paper.
PACS: 52.50.Dg – Plasma sources / 52.70.Kz – Optical (ultraviolet, visible, infrared) measurements / 52.80.Tn – Other gas discharges
© EDP Sciences, 2009
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