Aqueous reactive species induced by a PCB surface micro-discharge air plasma device: a quantitative study

被引:54
|
作者
Chen, Chen [1 ,2 ]
Li, Fanying [1 ]
Chen, Hai-Lan [1 ]
Kong, Michael G. [1 ,2 ,3 ]
机构
[1] Old Dominion Univ, Frank Reidy Ctr Bioelect, Norfolk, VA 23508 USA
[2] Xi An Jiao Tong Univ, Ctr Plasma Biomed, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peoples R China
[3] Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA
关键词
air plasma; surface micro-discharge; aqueous chemistry; reactive oxygen and nitrogen species; peroxynitrite; PEROXYNITRITE; 1-HYDROXY-2,2,6,6-TETRAMETHYL-4-OXO-PIPERIDINE; SUPEROXIDE; RADICALS; SPORES; WATER;
D O I
10.1088/1361-6463/aa8be9
中图分类号
O59 [应用物理学];
学科分类号
摘要
This paper presents a quantitative investigation on aqueous reactive species induced by air plasma generated from a printed circuit board surface micro- discharge (SMD) device. Under the conditions amenable for proliferation of mammalian cells, concentrations of ten types of reactive oxygen and nitrogen species (RONS) in phosphate buffering solution (PBS) are measured by chemical fluorescent assays and electron spin resonance spectroscopy (ESR). Results show that concentrations of several detected RNS (NO2, NO3-, peroxynitrites, and NO.(2)) are higher than those of ROS (H2O2, O-2(-), and O-1(2)) in the air plasma treated solution. Concentrations of NO3- can reach 150 times of H2O2 with 60 s plasma treatment. For shortlived species, the air plasma generates more copious peroxynitrite than other RONS including NO2., O-2, O-1(2), and NO. in PBS. In addition, the existence of reaction between H2O2 and NO2-/IINO2 to produce peroxynitrite is verified by the chemical scavenger experiments. The reaction relations between detected RONS are also discussed.
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页数:8
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