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Emission Spectroscopic Characterization of a Helium Atmospheric Pressure Plasma Jet with Various Mixtures of Argon Gas in the Presence and the Absence of De-Ionized Water as a Target

1
Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 24301, Taiwan
2
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
3
Department of Biomedical Engineering, National Yang Ming University, Taipei 112-21, Taiwan
*
Author to whom correspondence should be addressed.
Plasma 2019, 2(3), 283-293; https://doi.org/10.3390/plasma2030020
Received: 25 April 2019 / Revised: 21 June 2019 / Accepted: 3 July 2019 / Published: 4 July 2019
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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Abstract

A helium-based atmospheric pressure plasma jet (APPJ) with various flow rates of argon gas as a variable working gas was characterized by utilizing optical emission spectroscopy (OES) alongside the plasma jet. The spectroscopic characterization was performed through plasma exposure in direct and indirect interaction with and without de-ionized (DI) water. The electron density and electron temperature, which were estimated by Stark broadening of atomic hydrogen (486.1 nm) and the Boltzmann plot, were investigated as a function of the flow rate of argon gas. The spectra obtained by OES indicate that the hydroxyl concentrations reached a maximum value in the case of direct interaction with DI water as well as upstream of the plasma jet for all cases. The relative intensities of hydroxyl were optimized by changing the flow rate of argon gas. View Full-Text
Keywords: atmospheric pressure plasma jet; plasma characterization; optical emission spectroscopy atmospheric pressure plasma jet; plasma characterization; optical emission spectroscopy
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Bolouki, N.; Hsieh, J.-H.; Li, C.; Yang, Y.-Z. Emission Spectroscopic Characterization of a Helium Atmospheric Pressure Plasma Jet with Various Mixtures of Argon Gas in the Presence and the Absence of De-Ionized Water as a Target. Plasma 2019, 2, 283-293.

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