Investigation on dinitrogen pentoxide roles on air plasma effluent exposure to liquid water solution

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This paper experimentally discusses roles of dinitrogen pentoxide (N2O5gas) in the air plasma effluent gas on the effluent gas exposed liquid water, through nitrate () generation and nitration processes in the liquid phase. The generation from N2O5gas is suppressed approximately up to 50% by a competing reaction with a p-hydroxyl-phenyl-acetate (p-HPA) at pH = 11. This indicates a near-surface generation of an intermediate species derived from N2O5gas, which turns to . Also, it is found that the nitration reaction rate observed with NiSPY-3N can be of the order of the generation rate. From experimental results on the air plasma effluent gas and the liquid phase species, the role of the N2O5gas exposure to the liquid surface is interpreted as an intermediate species supply to the liquid surface, such as the solvated nitronium ion (). This deduced roles of N2O5gas can contribute to developments and understanding of the N2O5gas-involved plasma biological applications.

Original languageEnglish
Article number064003
JournalJournal Physics D: Applied Physics
Issue number6
Publication statusPublished - 2019 Feb 6


  • air plasma effluent
  • atmospheric pressure plasma
  • dinitrogen pentoxide
  • gas-liquid interface
  • nitration
  • nitronium ion


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