Pulsed dc- and sine-wave-excited cold atmospheric plasma plumes: A comparative analysis

Xiong, Q., Lu, X.P., Ostrikov, K., Xian, Y., Zou, C., Xiong, Z., & Pan, Y. (2010) Pulsed dc- and sine-wave-excited cold atmospheric plasma plumes: A comparative analysis. Physics of Plasmas, 17(4), 043506-1.

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Abstract

Cold atmospheric-pressure plasma plumes are generated in the ambient air by a single-electrode plasma jet device powered by pulsed dc and ac sine-wave excitation sources. Comprehensive comparisons of the plasma characteristics, including electrical properties, optical emission spectra, gas temperatures, plasma dynamics, and bacterial inactivation ability of the two plasmas are carried out. It is shown that the dc pulse excited plasma features a much larger discharge current and stronger optical emission than the sine-wave excited plasma. The gas temperature in the former discharge remains very close to the room temperature across the entire plume length; the sine-wave driven discharge also shows a uniform temperature profile, which is 20-30 degrees higher than the room temperature. The dc pulse excited plasma also shows a better performance in the inactivation of gram-positive staphylococcus aureus bacteria. These results suggest that the pulsed dc electric field is more effective for the generation of nonequilibrium atmospheric pressure plasma plumes for advanced plasma health care applications.

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53 citations in Scopus
43 citations in Web of Science®
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ID Code: 73797
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1063/1.3381132
ISSN: 1070-664X
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2010 American Institute of Physics
Deposited On: 10 Jul 2014 05:48
Last Modified: 11 Jul 2014 02:21

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