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A simple atmospheric pressure room-temperature air plasma needle device for biomedical applications

Authors :
Yuan Pan
Qing Xiong
C. Zou
ZhongHe Jiang
Xinpei Lu
W. Gong
Zilan Xiong
Yubin Xian
F. Zhao
Source :
Applied Physics Letters. 95:181501
Publication Year :
2009
Publisher :
AIP Publishing, 2009.

Abstract

Rather than using noble gas, room air is used as the working gas for an atmospheric pressure room-temperature plasma. The plasma is driven by submicrosecond pulsed directed current voltages. Several current spikes appear periodically for each voltage pulse. The first current spike has a peak value of more than 1.5 A with a pulse width of about 10 ns. Emission spectra show that besides excited OH, O, N2(C–B), and N2+(B–X) emission, excited NO, N2(B–A), H, and even N emission are also observed in the plasma, which indicates that the plasma may be more reactive than that generated by other plasma jet devices. Utilizing the room-temperature plasma, preliminary inactivation experiments show that Enterococcus faecalis can be killed with a treatment time of only several seconds.

Details

ISSN :
10773118 and 00036951
Volume :
95
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........35adac830a7370a16e834980e81570ea
Full Text :
https://doi.org/10.1063/1.3258071