Achieving reactive species specificity within plasma-activated water through selective generation using air spark and glow discharges

Peng Lu, Daniela Boehm, Paula Bourke*, Patrick J. Cullen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Plasma-activated liquids (PAL) attract increasing interest with demonstrated biological effects. Plasma exposure in air produces stable aqueous reactive species which can serve as chemical diagnostics of PAL systems. Here, we tailor aqueous reactive species inside plasma-activated water (PAW) through treating water with AC air spark and glow discharges in contact with water. Chemical probing demonstrated species specificity between two types of PAW. Spark discharge PAW contains H2O2 and NO- 3 while NO- 2 and NO- 3 are generated in glow discharge PAW. Species formation in different PAWs have been discussed in terms of discharge mechanisms and liquid phase chemistry process. Species specificity can provide richer parametric spaces for producing PALs with controlled impact and dosage achievable by combining discharge modes or mixing different PALs.

Original languageEnglish
Article number1600207
JournalPlasma Processes and Polymers
Volume14
Issue number8
DOIs
Publication statusPublished - 23 Aug 2017
Externally publishedYes

Keywords

  • electrolysis
  • glow discharge
  • plasma-activated water
  • reactive species
  • spark discharge

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

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