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

Appl. Phys. Lett. 95, 181501 (2009); doi:10.1063/1.3258071

Published 2 November 2009

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X. Lu,1 Z. Xiong,1 F. Zhao,2 Y. Xian,1 Q. Xiong,1 W. Gong,1 C. Zou,1 Z. Jiang,1 and Y. Pan1
1College of Electrical and Electronic Engineering, HuaZhong University of Science and Technology, WuHan, Hubei 430074, People's Republic of China
2XieHe Hospital, HuaZhong University of Science and Technology, WuHan, Hubei 430074, People's Republic of China
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. ©2009 American Institute of Physics
History: Received 28 August 2009; accepted 12 October 2009; published 2 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/181501/1
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0003-6951 (print)   1077-3118 (online)
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