Complex network analysis of low-temperature plasma reaction systems

Research on low-temperature plasmas is not only in physics but expanding into biology and medicine. The plasma reaction systems, however, tend to be complicated to understand as the number of chemical species and reaction equations considered increases. To solve this problem, it has been attempted to visualize chemical reaction equations graphically and analyze the plasma reaction systems through graph theory[1,2]. In this research, we analyzed the plasma reaction systems at different scales based on the graph theory to reveal their unique properties. Consequently, we revealed the primary species and fast reaction paths in the plasma reaction systems by visualizing their reaction network considering their reaction probability and found that there was a similar network structure even in the different plasma reaction networks. [1] O. Sakai, et al. AIP Adv. 5, 107140 (2015). [2] T. Murakami and O. Sakai, Plasma Sources Sci. Technol. 29, 115018 (2020).