## 3 Results  
### Measurement of Generated Reactive Species  
The relationship between the gas temperature of the plasma and the number of reactive species produced for each gas species is shown in Figure 2. The concentration of OH radicals was highest at approximately 130 uM or more in the nitrogen plasma and at 20-40 uM in the carbon dioxide and argon plasmas. The lowest concentration was detected in oxygen plasma at 10 uM or less. In the nitrogen plasma, the concentration of OH radicals increased from 146 to 172 uM with a change in the plasma gas temperature from 30 to 45 \({}^{\circ}\)C, showed an insignificant change from 45 to 75 \({}^{\circ}\)C, and decreased to 131 uM with a change in temperature from 75 to 90 \({}^{\circ}\)C. In the carbon dioxide plasma, the concentration increased from 26 to 39 uM with a change in the plasma gas temperature from 30 to 90 \({}^{\circ}\)C. In the argon plasma, the concentration increased from 28 to 34 uM with a change in the plasma gas temperature from 30 to 45 \({}^{\circ}\)C. There was almost no change in concentration when the plasma gas temperature increased from 45 to 75 \({}^{\circ}\)C, and the concentration decreased to 27 uM with a change in the plasma gas temperature from 75 to 90 \({}^{\circ}\)C. In the oxygen plasma, the concentration increased from 5.7 to 10 uM with a change in the plasma gas temperature from 30 to 90 \({}^{\circ}\)C.  
The concentration of the singlet oxygen was higher in each plasma variant in the order of oxygen, carbon dioxide, nitrogen, and argon when the plasma gas temperature was 30 \({}^{\circ}\)C. A significant increase in concentration was observed in the carbon dioxide plasma above 45 \({}^{\circ}\)C. The concentration of the singlet oxygen in the carbon dioxide plasma increased from 77 to 459 uM, as the plasma gas temperature changed from 30 to 45 \({}^{\circ}\)C. From 45 to 60 \({}^{\circ}\)C, there was almost no change in the concentration, and from 60 to 90 \({}^{\circ}\)C, there was an increase in the concentration from 435 to 812 uM. In the oxygen plasma, the concentration increased from 96 to 208 uM with a change in the plasma gas temperature from 30 to 90 \({}^{\circ}\)C. In the nitrogen plasma, the amount produced increased from 56 to 115 uM with a change in the plasma gas temperature from 30 to 90 \({}^{\circ}\)C. In the case of argon plasma, the amount produced increased from 16 to 24 uM with a temperature change from 30 to 75 \({}^{\circ}\)C, and decreased to 13 uM at 90 \({}^{\circ}\)C.  
In the oxygen plasma, the concentration of ozone was 3.4 uM at 30 \({}^{\circ}\)C, reached a minimum of 2.0 uM at 60 \({}^{\circ}\)C, and increased to 3.1 uM as the temperature increased to 90 \({}^{\circ}\)C. In the argon plasma, the concentration decreased slowly between 30 and 75 \({}^{\circ}\)C from 3.0 to 2.3 uM, and then increased to 2.6 uM at 90 \({}^{\circ}\)C. In the nitrogen plasma, the concentration was not significantly affected by the plasma gas temperature, and was 2.0 \(\pm\) 0.2 uM between 30 and 90 \({}^{\circ}\)C. In the carbon dioxide plasma, the concentration decreased slowly from 2.0 to 1.2 uM with a change in temperature from 30 to 90 \({}^{\circ}\)C.  
The concentration of hydrogen peroxide was higher in the carbon dioxide plasma, similar to the argon and nitrogen plasmas, and lower in the oxygen plasma. In the carbon dioxide plasma, the concentration decreased from 32 to 26 uM between 30 and 60 \({}^{\circ}\)C, and increased significantly to 56 uM as the gas temperature increased to 90 \({}^{\circ}\)C. In the nitrogen plasma, the concentration was almost constant between 30 and 90 \({}^{\circ}\)C, but decreased to 17 uM only at 45 \({}^{\circ}\)C. In the argon plasma, the change in the plasma gas temperature had an insignificant effect on the concentration, which remained constant at 21 uM. In the oxygen plasma, the concentration increased slowly from 6 to 19 uM between 30 and 90 \({}^{\circ}\)C.