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Chinese Physics, 2004, Vol. 13(6): 913-917    DOI: 10.1088/1009-1963/13/6/022
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

Sterilization of E. coli bacterium with an atmospheric pressure surface barrier discharge

Xu Lei (徐蕾)a, Zhang Rui (张锐)a, Liu Peng (刘鹏)a, Ding Li-Li (丁丽莉)b, Zhan Ru-Juan (詹如娟)a
a Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; b Department of Life Science, University of Science and Technology of China, Hefei 230026, China
Abstract  The atmospheric pressure surface barrier discharge (APSBD) in air has been used in killing Escherichia coli (E. coli). There is almost no bacterial colony in the sample after treatment by discharge plasma for 2 min. A diagnostic technique based on mass spectrum has been applied to the discharge gas and the mechanism of killing is discussed. Ozone and monatomic oxide are considered to be the major antimicrobial active species. There is almost no harmful by-product. The experiment proves that APSBD plasma is a very simple, effective and innocuous tool for sterilization.
Keywords:  surface barrier discharge      non-equilibrium plasma      sterilization  
Received:  20 October 2003      Revised:  13 January 2004      Accepted manuscript online: 
PACS:  87.80.-y (Biophysical techniques (research methods))  
  52.80.-s (Electric discharges)  
  52.77.-j (Plasma applications)  
Fund: Project supported by the Natural Science Foundation of Anhui Province (Grant No 03044702).

Cite this article: 

Xu Lei (徐蕾), Zhang Rui (张锐), Liu Peng (刘鹏), Ding Li-Li (丁丽莉), Zhan Ru-Juan (詹如娟) Sterilization of E. coli bacterium with an atmospheric pressure surface barrier discharge 2004 Chinese Physics 13 913

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