TAILIEUCHUNG - Cold atmospheric pressure gliding ARC plasma JET for decontamination

A cold atmospheric pressure gliding arc plasma jet has been developed and applied to disinfection. The size of the plasma output is about 6 mm in diameter and 10 mm in length. Ar gas at a flow rate of 10 slm and 25 W plasma power are used. Plasma discharge is produced between the divergent electrodes and the jet appears as an effluence of the gas flow. When a pseudomonas culture is placed at 8 mm below the torch for 1minute, where the gas is at room temperature, the bacteria within a 16 mm diameter circle are almost completely killed. | Communications in Physics, Vol. 24, No. 3S2 (2014), pp. 101-106 DOI: COLD ATMOSPHERIC PRESSURE GLIDING ARC PLASMA JET FOR DECONTAMINATION DO HOANG TUNG Institute of Physics, Vietnam Academy of Science and Technology BACH SY MINH, VU THI THOM, AND LAM THI HUYEN TRANG School of Medicine and Pharmacy, Vietnam National University, Hanoi CAO THI HUONG Thai Binh College of Education, Thai Binh, Vietnam NGUYEN THI TUYEN Hanoi Medical University E-mail: dhtung@ Received 04 April 2014 Accepted for publication 24 May 2014 Abstract. A cold atmospheric pressure gliding arc plasma jet has been developed and applied to disinfection. The size of the plasma output is about 6 mm in diameter and 10 mm in length. Ar gas at a flow rate of 10 slm and 25 W plasma power are used. Plasma discharge is produced between the divergent electrodes and the jet appears as an effluence of the gas flow. When a pseudomonas culture is placed at 8 mm below the torch for 1minute, where the gas is at room temperature, the bacteria within a 16 mm diameter circle are almost completely killed. As the UV radiation is well below the safety regulation, the bacteria are inactivated by the total effect of UV radiation and others like the reactive species and the charged particles. Keywords: CAP; antimicrobial effect; gliding arc; wound healing. I. INTRODUCTION Physical plasma is a promising technology regarding its antimicrobial effects, especially in treatment of bacterial infected chronic wounds. Moreover, various plasma-based medical applications have been investigated with growing interest. Recently, research in atmospheric plasma sources has been quite active, as they have many advantages, . low cost, simple design and easy handling [1]. These plasmas provide many chemical reactions at room-temperature and at atmospheric pressure due to the presence of high energy electrons. These discharges can be utilized for the cleaning of medical equipment [2, 3]. In .

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