A low power microwave room-temperature air plasma jet at atmospheric pressure
A low power microwave room-temperature air plasma jet at atmospheric pressure
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DOI：
10.1063/5.0152898
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发表时间：
2023-07
影响因子：
4
通讯作者：
Li Wu;Xianyu Zhang;Tao Liu;Wencong Zhang;Jun-Lei Tao;Fei Cheng
中科院分区：
文献类型：
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作者：
Li Wu;Xianyu Zhang;Tao Liu;Wencong Zhang;Jun-Lei Tao;Fei Cheng
本文介绍了一种工作频率为2.45GHz的大气压低功率微波诱导空气等离子体源。该装置能够自燃空气和产生等离子体，只有50 W的微波输入功率，没有任何额外的触发。其维持功率低至10 W，用光纤温度计测量等离子体尾焰的气体温度约为32 °C。光谱测量显示在306-310 nm处的强OH（A2 <$+→X2 <$+）带和在777.1 nm处的氧原子线OI（3 p5 P → 3s 5S）和在844.6 nm处的氧原子线OI（3 p3 P → 3s 3S）。在该空气等离子体射流中还检测到200至300 nm的NO−γ（A2 <$+→X2 <$r）。这种便携式等离子体装置为空气等离子体在生物医学领域的应用提供了潜力。
An atmospheric pressure low power microwave-induced air plasma source at 2.45 GHz is presented in this Letter. The device was capable of self-igniting air and generating plasma with only 50 W microwave input power and without any extra trigger. Its sustaining power was as low as 10 W, and the gas temperature of plasma tail flame measured by a fiber optic thermometer was about 32 °C. Spectroscopic measurements showed strong OH(A2Σ+→X2Π) bands at 306–310 nm and oxygen atomic lines OI (3p5P → 3s5S) at 777.1 nm and OI (3p3P → 3s3S) at 844.6 nm. NO−γ(A2Σ+→X2Πr) from 200 to 300 nm was also detected in this air plasma jet. This portable plasma apparatus offers potential for air plasma applications in the biomedical fields.