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

    Research output: Contribution to journalArticlepeer-review

    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 - Aug 2017

    Keywords

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

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