Investigation of a Novel Atmospheric Pressure Microwave Cold Plasma Torch and Its Characteristics

doi:10.1007/s40242-024-4112-7

Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (6): 1282-1289.doi: 10.1007/s40242-024-4112-7

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Investigation of a Novel Atmospheric Pressure Microwave Cold Plasma Torch and Its Characteristics

LI Yarui^1,2, BAI Yiwen², YU Dengjie^1,2, WANG Rongyao^1,2, MU Ying^1,2, JIN Wei^1,2, YU Bingwen^1,2

1. Research Center for Analytical Instrumentation, Institute of Cyber-Systems and Control, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China;
2. Research Center for Analytical Instruments and Intelligent Systems, Huzhou Institute of Zhejiang University, Huzhou 313000, P. R. China

Received:2024-05-01 Online:2024-12-01 Published:2024-10-26
Contact: JIN Wei,jinweimy@zju.edu.cn;YU Bingwen,yubingwen007@zju.edu.cn E-mail:jinweimy@zju.edu.cn;yubingwen007@zju.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (No. 62073287) and the Science and Technology Program of Huzhou, China (No. 2022YZ28).

Abstract

Abstract: This study proposes a coaxial structure atmospheric pressure microwave cold plasma device that utilizes argon as the main working gas. It achieves stable formation of atmospheric pressure cold plasma jet at low power (<50 W) with a jet length ranging from 1 mm to 32 mm. The paper analyzes the composition of the cold plasma using spectroscopy and investigates its composition changes at different positions along the jet. It also studies the appearance and reaction composition of the plasma filament under different shielding gases. Furthermore, it explores the effects of continuous and modulated microwave power on the length, appearance, and composition of the plasma filament. Finally, it examines the bactericidal effect of the plasma filament on Escherichia coli under various gas conditions, providing a foundation for further application research.

Key words: Microwave cold plasma, Spectral analysis, Modulated microwave source, Sterilization

LI Yarui, BAI Yiwen, YU Dengjie, WANG Rongyao, MU Ying, JIN Wei, YU Bingwen. Investigation of a Novel Atmospheric Pressure Microwave Cold Plasma Torch and Its Characteristics[J]. Chemical Research in Chinese Universities, 2024, 40(6): 1282-1289.

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Investigation of a Novel Atmospheric Pressure Microwave Cold Plasma Torch and Its Characteristics

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