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Assessment of the roles of various inactivation agents in an argon-based direct current atmospheric pressure cold plasma jet
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10.1063/1.4730627
/content/aip/journal/jap/111/12/10.1063/1.4730627
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/12/10.1063/1.4730627

Figures

Image of FIG. 1.
FIG. 1.

A schematic diagram of the PMJ operating in water and the OES detection setup.

Image of FIG. 2.
FIG. 2.

Inactivation efficacies of the PMJ as a function of plasma exposure time for the three operating gases.

Image of FIG. 3.
FIG. 3.

SEM pictures of S. aureus: (a) before treatment, (b) after 10 min of [Ar] PMJ treatment, (c) after 10 min of [Ar/O2/N2] PMJ treatment, and (d) after 10 min of [Ar/O2] PMJ treatment.

Image of FIG. 4.
FIG. 4.

Optical emission spectra of: (a)[Ar] plasma, (b) [Ar/O2] plasma, (c) [Ar/O2/N2] plasma, and (d) a comparison of the O (777 nm) emission intensities for the three plasmas.

Image of FIG. 5.
FIG. 5.

Electron spin resonance spin-trapping spectra of (a) DMPO-OH (spin adduct of OH), (b) TEMPO (spin adduct of 1O2), and (c) (DETC)2-Fe2+-NO (spin adduct of NO, labeled by solid squares (▪)). The signals labeled by the hollow squares (□) are attributed to DETC-Cu2+.

Image of FIG. 6.
FIG. 6.

Long lived species generated after 10 min PMJ treatment: (a) O3 concentration evaluated in air in a semi-confined zone and H2O2 concentration in water and (b) Cu+/Cu2+ concentration in water.

Image of FIG. 7.
FIG. 7.

(a) pH value of the water treated by [Ar], [Ar/O2], and [Ar/O2/N2] PMJ for different times, (b) temperature of the water treated by [Ar], [Ar/O2], and [Ar/O2/N2] PMJ for with different times.

Tables

Generic image for table
Table I.

Immediate and intermediate species generated in the [Ar/O2], [Ar/O2/N2], and [Ar] PMJ-water system along with temperature, discharge voltage, and acidity change, respectively. Numbers 1 (highest) to 3 (lowest) denote their ordering.

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/content/aip/journal/jap/111/12/10.1063/1.4730627
2012-06-26
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Assessment of the roles of various inactivation agents in an argon-based direct current atmospheric pressure cold plasma jet
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/12/10.1063/1.4730627
10.1063/1.4730627
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