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Diagnostics of atmospheric pressure microplasma with a liquid electrode

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Abstract

A rf atmospheric pressure microplasma (APMP) in contact with a liquid electrode is characterized by an optical emission spectroscopy (OES) and a liquid chromatography. The results show that the solution conductivity is the essence for determining the APMP properties rather than the solution pH value. A liquid acidification observed during the APMP treatment is ascribed to the salvation of nitrogen related species created by the APMP. In addition, a typical two-sheath structure of the APMP is revealed by the spatial distribution of OES along the plasma volume. The estimated electron density of the APMP is as high as 1014–1015 cm-3.

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Authors and Affiliations

  1. Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, 338-8570, Saitama, Japan

    Q. Chen & H. Shirai

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  1. Q. Chen
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  2. H. Shirai
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Correspondence to Q. Chen.

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Chen, Q., Shirai, H. Diagnostics of atmospheric pressure microplasma with a liquid electrode. Eur. Phys. J. D 66, 161 (2012). https://doi.org/10.1140/epjd/e2012-20709-1

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  • DOI: https://doi.org/10.1140/epjd/e2012-20709-1

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