Development of a new atmospheric pressure cold plasma jet generator and application in sterilization

doi:10.1088/1009-1963/15/7/028

中国物理B ›› 2006, Vol. 15 ›› Issue (7): 1544-1548.doi: 10.1088/1009-1963/15/7/028

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Development of a new atmospheric pressure cold plasma jet generator and application in sterilization

程诚¹, 刘鹏¹, 徐蕾¹, 张力叶¹, 詹如娟¹, 张文锐²

(1)Department of Modern Physics, University of Science and Technology of China, CAS Key Laboratory of Basic Plasma Physics, School of Science, Hefei 230026, China; (2)School of Life Science, University of Science and Technology of China, Hefei 230026, China

收稿日期:2005-10-12 修回日期:2005-11-29 出版日期:2006-07-20 发布日期:2006-07-20

Development of a new atmospheric pressure cold plasma jet generator and application in sterilization

Cheng Cheng (程诚)^a, Liu Peng (刘鹏)^a, Xu Lei (徐蕾)^a, Zhang Li-Ye (张力叶)^a, Zhan Ru-Juan (詹如娟)^a, Zhang Wen-Rui (张文锐)^b

^a Department of Modern Physics, University of Science and Technology of China, CAS Key Laboratory of Basic Plasma Physics, School of Science, Hefei 230026, China; ^b School of Life Science, University of Science and Technology of China, Hefei 230026, China

Received:2005-10-12 Revised:2005-11-29 Online:2006-07-20 Published:2006-07-20

摘要/Abstract

摘要： This paper reports that a new plasma generator at atmospheric pressure, which is composed of two homocentric cylindrical all-metal tubes, successfully generates a cold plasma jet. The inside tube electrode is connected to ground, the outside tube electrode is connected to a high-voltage power supply, and a dielectric layer is covered on the outside tube electrode. When the reactor is operated by low-frequency (6 kHz--20 kHz) AC supply in atmospheric pressure and argon is steadily fed as a discharge gas through inside tube electrode, a cold plasma jet is blown out into air and the plasma gas temperature is only 25--30℃. The electric character of the discharge is studied by using digital real-time oscilloscope (TDS 200-Series), and the discharge is capacitive. Preliminary results are presented on the decontamination of E.colis bacteria and Bacillus subtilis bacteria by this plasma jet, and an optical emission analysis of the plasma jet is presented in this paper. The ozone concentration generated by the plasma jet is 1.0×10¹⁶cm^-3 which is acquired by using the ultraviolet absorption spectroscopy.

Abstract: This paper reports that a new plasma generator at atmospheric pressure, which is composed of two homocentric cylindrical all-metal tubes, successfully generates a cold plasma jet. The inside tube electrode is connected to ground, the outside tube electrode is connected to a high-voltage power supply, and a dielectric layer is covered on the outside tube electrode. When the reactor is operated by low-frequency (6 kHz--20 kHz) AC supply in atmospheric pressure and argon is steadily fed as a discharge gas through inside tube electrode, a cold plasma jet is blown out into air and the plasma gas temperature is only 25--30℃. The electric character of the discharge is studied by using digital real-time oscilloscope (TDS 200-Series), and the discharge is capacitive. Preliminary results are presented on the decontamination of E.colis bacteria and Bacillus subtilis bacteria by this plasma jet, and an optical emission analysis of the plasma jet is presented in this paper. The ozone concentration generated by the plasma jet is 1.0×10¹⁶cm^-3 which is acquired by using the ultraviolet absorption spectroscopy.

Key words: atmospheric pressure cold plasma jet, sterilization, spectral measurement

中图分类号: (Plasma devices)

52.75.-d

52.77.Bn (Etching and cleaning) 52.77.Dq (Plasma-based ion implantation and deposition) 52.80.-s (Electric discharges)

程诚, 刘鹏, 徐蕾, 张力叶, 詹如娟, 张文锐. Development of a new atmospheric pressure cold plasma jet generator and application in sterilization[J]. 中国物理B, 2006, 15(7): 1544-1548.

Cheng Cheng (程诚), Liu Peng (刘鹏), Xu Lei (徐蕾), Zhang Li-Ye (张力叶), Zhan Ru-Juan (詹如娟), Zhang Wen-Rui (张文锐). Development of a new atmospheric pressure cold plasma jet generator and application in sterilization[J]. Chinese Physics, 2006, 15(7): 1544-1548.

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Development of a new atmospheric pressure cold plasma jet generator and application in sterilization

Development of a new atmospheric pressure cold plasma jet generator and application in sterilization

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