Theoretical simulation study of laser-induced plasma bombardment on bacteria  

作　　者：Junxiao WANG Yan ZHANG Wanfei ZHANG Yong GUO Lei ZHANG Zefu YE Zhujun ZHU Wangbao YIN Suotang JIA 王俊霄;张岩;张婉飞;郭勇;张雷;叶泽甫;朱竹军;尹王保;贾锁堂(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,People’s Republic of China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,People’s Republic of China;School of Optoelectronic Engineering,Xi’an Technological University,Xian 710021,People’s Republic of China;Shanxi Xinhua Chemical Defense Equipment Research Institute Co.Ltd.,Taiyuan 030008,People’s Republic of China;Shanxi Gemeng US-China Clean Energy R&D Center Co.Ltd.,Taiyuan 030032,People’s Republic of China)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,People’s Republic of China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,People’s Republic of China [3]School of Optoelectronic Engineering,Xi’an Technological University,Xian 710021,People’s Republic of China [4]Shanxi Xinhua Chemical Defense Equipment Research Institute Co.Ltd.,Taiyuan 030008,People’s Republic of China [5]Shanxi Gemeng US-China Clean Energy R&D Center Co.Ltd.,Taiyuan 030032,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第10期101-107,共7页等离子体科学和技术（英文版）

基　　金：supported by National Key R&D Program of China(No.2017YFA0304203);National Energy R&D Center of Petroleum Refining Technology(RIPP,SINOPEC),Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(No.IRT_17R70);National Natural Science Foundation of China(Nos.12374377,61975103 and 627010407);111 Project(No.D18001);Fund for Shanxi‘1331KSC’。

摘　　要：With the rapid advancement of laser decontamination technology and growing awareness of microbial hazards,it becomes crucial to employ theoretical model to simulate and evaluate decontamination processes by laser-induced plasma.This study employs a two-dimensional axisymmetric fluid dynamics model to simulate the power density of plasma bombardment on bacteria and access its decontamination effects.The model considers the transport processes of vapor plasma and background gas molecules.Based on the destructive impact of high-speed moving particles in the plasma on bacteria,we investigate the bombardment power density under various conditions,including different laser spot sizes,wavelengths,plate's tilt angles,and plate-target spacing.The results reveal that the bombardment power density increases with a decrease in laser spot size and wavelength.For instance,when the plate is parallel to the target surface with a 1 mm spacing,the bombardment power density triples as the laser spot size decreases from 0.8 mm to 0.5 mm and quadruples as the wavelength decreases from 1064 nm to 266 nm.Notably,when the plate is parallel to the target with a relatively close spacing of 0.5 mm,the bombardment power density at 0°inclination increases sevenfold compared to 45°.This simulation study is essential for optimizing optical parameters and designing component layouts in decontamination devices using laser-induced plasma.The reduction of laser spot size,wavelength,plate-target spacing and aligning the plate parallel to the target,collectively contribute to achieving precise and effective decontamination.

关 键 词：laser-induced breakdown spectroscopy fluid dynamics model bacterial decontamination 

分 类 号：TN249[电子电信—物理电子学]