Distribution of OH within silent discharge plasma reactors

Coogan, J.J.; Sappey, Andrew D.

doi:10.1109/27.491706

Cited by 33 publications

(17 citation statements)

References 5 publications

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“…Temporal variation of discharge current in Figure 4 top plot suggests that each event occurred in the nanosecond time scale, as reported before (Coogan and Sappey 1996;Kogelschatz 2002). The Lissajous plots' areas in Figure 5 also revealed that the respective energy consumed (J) remained comparable irrespective of the frequency.…”

Section: Resultsmentioning

confidence: 60%

Ozone Generation from Argon-Oxygen Mixtures in Presence of Different Packing Materials within Dielectric Barrier Discharge Gap

Dwivedi

Toley

Dey

et al. 2013

Ozone: Science & Engineering

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Assessments of ozone yield and concentration in DielectricBarrier Discharge of argon-oxygen mixtures in presence of various packing materials are discussed. These include zeolite molecular sieve 13X pellets, Pyrex beads, Pyrex wool, and porous TiO 2 -beads, which presented differential reactive surfaces, nano cavities, photo-catalysis, and dissimilar ionic environments. Their utility was evaluated in conjunction with varied gas composition, flow rate, and electrical inputs. In a mixture of 3-21% O 2 in argon, the ozone concentration ranged between 16-980 ppm, simultaneous measurements of in situ energy dissipation revealed its yield, G(O 3 ) to change independently from 0.002 to 2.020 μmol J −1 . TiO 2 packing emerged as the most versatile material to produce O 3 in high concentration and yield.

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Section: Resultsmentioning

confidence: 60%

Ozone Generation from Argon-Oxygen Mixtures in Presence of Different Packing Materials within Dielectric Barrier Discharge Gap

Dwivedi

Toley

Dey

et al. 2013

Ozone: Science & Engineering

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“…However, as this discharge was in saline, the outcome is likely to be different from a discharge in air. The presence of OH• in the microdischarges of a silent discharge plasma reactor has also been imaged using OH• fluorescence [64]. It was demonstrated that OH• only exists in the channels formed by the transient discharges, and did not diffuse out.…”

Section: Chemistry Of Electric Dischargesmentioning

confidence: 97%

Bactericidal Action of the Reactive Species Produced by Gas-Discharge Nonthermal Plasma at Atmospheric Pressure: A Review

Gaunt

Beggs

Georghiou

2006

IEEE Trans. Plasma Sci.

306

163

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Biological decontamination using a nonthermal gas discharge at atmospheric pressure in air is the subject of significant research effort at this time. The mechanism for bacterial deactivation undergoes a lot of speculation, particularly with regard to the role of ions and reactive gas species. Two mechanisms have been proposed: electrostatic disruption of cell membranes and lethal oxidation of membrane or cytoplasmic components. Results show that death is accompanied by cell lysis and fragmentation in Gram-negative bacteria but not Gram-positive species, although cytoplasmic leakage is generally observed. Gas discharges can be a source of charged particles, ions, reactive gas species, radicals, and radiation (ultraviolet, infrared, and visible), many of which have documented biocidal properties. The individual roles played by these in decontamination are not well understood or quantified. However, the reactions of some species with biomolecules are documented otherwise in the literature. Oxidative stress is relatively well studied, and it is likely that exposure to gas discharges in air causes extreme oxidative challenge. In this paper, a review is presented of the major reactive species generated by nonthermal plasma at atmospheric pressure and the known reactions of these with biological molecules. Understanding these mechanisms becomes increasingly important as plasma-based decontamination and sterilization devices come closer to a wide-scale application in medical, healthcare, food processing, and air purification applications. Approaches are proposed to elucidate the relative importance of reactive species.

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“…[116][117][118][119] The effect of plasma nonequilibrium on vibrational and electronic energy transfer is analyzed (Treanor effect in vibrational energy transfer). [120][121][122] Radiation heat transfer in plasma is considered depending on specific organization of plasma processes (optically thin and optically thick plasmas). Diffusion is discussed paying special attention to that of charged particles, including ambipolar diffusion and diffusion in the presence of magnetic field.…”

Section: Transfer Processes In Plasmas Used For Medical Applicationsmentioning

confidence: 99%

Review of Major Directions in Non-Equilibrium Atmospheric Plasma Treatments in Medical, Biological, and Bioengineering Applications

Han

2013

Plasma Med

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Plasma Medicine is the newest and rapidly expanding area of engineering medicine and bioengineering focused on direct applications of plasma for treatment of different diseases, blood coagulation control, wound management, and wound healing, as well as improving patient care through sterilization, medical implants, biomaterial engineering, and tissue engineering. The number of medical engineering professionals, researchers, upper undergraduate, and graduate university students involved today in plasma medicine is already large and growing; there is also an exponentially growing number of publications in this new field. All these students and professionals need the ability to find these publications to aid them in getting started and to advance in their research in plasma medicine. This determines the main purpose of this review, focused on, first of all, summarizing the major directions of fundamental plasma medicine and providing an extensive guide to specific diseases with current plasma-bioengineering solutions, as well as providing a relevant, up-to-date bibliography.

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Distribution of OH within silent discharge plasma reactors

Cited by 33 publications

References 5 publications

Ozone Generation from Argon-Oxygen Mixtures in Presence of Different Packing Materials within Dielectric Barrier Discharge Gap

Ozone Generation from Argon-Oxygen Mixtures in Presence of Different Packing Materials within Dielectric Barrier Discharge Gap

Bactericidal Action of the Reactive Species Produced by Gas-Discharge Nonthermal Plasma at Atmospheric Pressure: A Review

Review of Major Directions in Non-Equilibrium Atmospheric Plasma Treatments in Medical, Biological, and Bioengineering Applications

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