Sterilization and plasma processing of room temperature surfaces with a one atmosphere uniform glow discharge plasma (OAUGDP)

Gadri, R.B.; Roth, J. Reece; Montie, Thomas C.; Kelly-Wintenberg, K.; Tsai, Ping-Huei; Helfritch, D.J.; Feldman, Paul L.; Sherman, D.M.; Karakaya, Fuat; Chen, Zhiyu

doi:10.1016/s0257-8972(00)00803-3

Cited by 223 publications

(113 citation statements)

References 20 publications

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“…It is known that vegetative cells tend to be more susceptible to plasma application than spores, as is generally true of most sterilizing systems. Differences in efficacy of such systems have also been demonstrated regarding grampositive and gram-negative bacteria 23) where gramnegative species have been seen to be more susceptible to plasma treatment than gram positive ones. This can be explained by the higher susceptibility of the gram negative, thinner murein layer (~2 nm) compared to gram-positive bacteria (~15 nm) to the plasma produced reactive oxygen species.…”

Section: Sterilization Test On Agar Platesmentioning

confidence: 99%

Irradiation effects of low temperature multi gas plasma jet on oral bacteria

Abonti

Kaku

Kojima

et al. 2016

Dental Materials Journal

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The purpose of this study is to evaluate the sterilization effects of a newly developed low temperature multi gas plasma jet on oral pathogenic microorganisms (Streptococcus mutans [S. mutans], Lactobacillus fermentum [L. fermentum], Aggregatibacter actinomycetemcomitans [A. actinomycetemcomitans]). Plasma gas which generated from O2, N2, Ar and 50% (O2+N2) was irradiated to the microbes. Effect of O2 plasma irradiation on S. mutans under scanning electron microscopy (SEM) was also observed. O2 plasma was directly applied to dental plaque on human extracted tooth. Then, the depth of enamel resorption area was noted by nanoscale hybrid microscope. O2 had the best sterilizing effect for all microbes. The potent bactericidal effect of plasma irradiation was also observed by SEM. Decalcification of enamel was noted significantly lower in plasma irradiated tooth surface compared to no plasma exposure group. These findings revealed that multi gas plasma jet has great potential to be used for dental treatment.

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Section: Sterilization Test On Agar Platesmentioning

confidence: 99%

Irradiation effects of low temperature multi gas plasma jet on oral bacteria

Abonti

Kaku

Kojima

et al. 2016

Dental Materials Journal

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“…Although the jet array is capable of simultaneous firing of all component jets, it is still a challenge to form a large area of plasma jet with good uniformity of active species and less temperature fluctuation on the downstream substrate due to jet-to-jet coupling effects. [12][13][14] In this aspect, experimental studies on jet-to-jet interaction with different gas flow rates are investigated by Kim and his co-workers, 15 which reveals the effect of interactions between different plasma jets. However, these studies mainly focused on DBD plasma jets which can generate long jets downstream the exit of the generator with concentrated discharge channels.…”

Section: Introductionmentioning

confidence: 99%

Characteristics in the jet region of helium radio-frequency atmospheric-pressure glow discharge with array generators

Wang

Nie

2015

AIP Advances

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The two-dimensional spatially extended atmospheric plasma arrays by many parallel radio-frequency glow discharge plasma jets packed densely, represent a feature option of large-scale low-temperature atmospheric plasma technologies with distinct capability of directed delivery of reactive species and good insusceptibility to sample variations. However, it is still a challenge to form plasma jet with large area of uniform active species on a downstream substrate due to the complex interactions between individual jets. This paper proposes to numerically study the strategy and mechanism of control/modulation for the array discharge to produce two-dimensional plasma uniformity in the downstream working area. In this work, a two dimensional fluid model is employed to investigate the characteristics in the jet region of helium radio-frequency atmospheric-pressure glow discharge (RF APGD) with array generators. The influences of upstream discharge characteristics, gas flow and their cooperative effects on the distribution of species densities, gas temperatures and the uniformity of active species in the material treating area is studied, and the essential strategy for the modulation method is acquired. The results will be significant for deep understanding of coupling behaviors of multiple plasma plumes in the RF APGD array and applications of the technology.

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“…During the last decade, the basics of sterilizing effects of plasmas were well studied [6][7][8][9][10][11][12]. Recently, therapeutic applications are of great concern.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric-pressure plasma sources: Prospective tools for plasma medicine

Weltmann

Kindel

Woedtke

et al. 2010

Pure and Applied Chemistry

406

243

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Plasma-based treatment of chronic wounds or skin diseases as well as tissue engineering or tumor treatment is an extremely promising field. First practical studies are promising, and plasma medicine as an independent medical field is emerging worldwide. While during the last years the basics of sterilizing effects of plasmas were well studied, concepts of tailor-made plasma sources which meet the technical requirements of medical instrumentation are still less developed. Indeed, studies on the verification of selective antiseptic effects of plasmas are required, but the development of advanced plasma sources for biomedical applications and a profound knowledge of their physics, chemistry, and parameters must be contributed by physical research. Considering atmospheric-pressure plasma sources, the determination of discharge development and plasma parameters is a great challenge, due to the high complexity and limited diagnostic approaches. This contribution gives an overview on plasma sources for therapeutic applications in plasma medicine. Selected specific plasma sources that are used for the investigation of various biological effects are presented and discussed. Furthermore, the needs, prospects, and approaches for its characterization from the fundamental plasma physical point of view will be discussed.

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Sterilization and plasma processing of room temperature surfaces with a one atmosphere uniform glow discharge plasma (OAUGDP)

Cited by 223 publications

References 20 publications

Irradiation effects of low temperature multi gas plasma jet on oral bacteria

Irradiation effects of low temperature multi gas plasma jet on oral bacteria

Characteristics in the jet region of helium radio-frequency atmospheric-pressure glow discharge with array generators

Atmospheric-pressure plasma sources: Prospective tools for plasma medicine

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