Inner surface biofilm inactivation by atmospheric pressure helium porous plasma jet

Peng Lu, Dana Ziuzina, Patrick J. Cullen, Paula Bourke*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We present a helium porous plasma jet based on gas diffuser, designed with the aim of decontaminating inner surfaces of contaminated structures, e.g., pipes. The porous plasma jet operates with three discharge modes in ambient air and inside a vessel. Its decontamination capacity is demonstrated by evaluating the inactivation efficacy of biofilm form of Pseudomonas aeruginosa, adherent to inner surface of a glass vial. Plasma treatments for 5 min with filament mode and double region helium discharge mode reduced bacterial numbers by 2.4 and 2.5 Log10 CFU/ml. Plasma treatment with double region air-like discharge mode was the most effective, reducing bacterial cells by 4.5 Log10 CFU/ml, which demonstrates porous plasma jet could provide an efficient approach for inner surface decontamination.

Original languageEnglish
Article number1800055
JournalPlasma Processes and Polymers
Issue number12
Publication statusPublished - 01 Dec 2018
Externally publishedYes


  • biofilm
  • discharge mode
  • gas diffuser
  • inner surface
  • porous plasma jet

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

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