Low pressure water vapour plasma treatment of surfaces for biomolecules decontamination.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Decontamination treatments of surfaces are performed on bacterial spores, albumin and brain
homogenate used as models of biological contaminations in a low-pressure, inductively
coupled plasma reactor operated with water-vapour-based gas mixtures. It is shown that
removal of contamination can be achieved using pure H2O or Ar/H2O mixtures at low
temperatures with removal rates comparable to oxygen-based mixtures. Particle fluxes (Ar+
ions, O and H atomic radicals and OH molecular radicals) from water vapour discharge are
measured by optical emission spectroscopy and Langmuir probe under several operating
conditions. Analysis of particle fluxes and removal rates measurements illustrates the role of
ion bombardment associated with O radicals, governing the removal rates of organic matter.
Auxiliary role of hydroxyl radicals is discussed on the basis of experimental data. The
advantages of a water vapour plasma process are discussed for practical applications in
medical devices decontamination.
Original languageEnglish
JournalJournal of Physics D: Applied Physics
Issue number13
Pages (from-to)135203
Number of pages9
StatePublished - 2012
CitationsWeb of Science® Times Cited: 22
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