A Novel Room-Temperature Air Plasma Jet Array Driven by DC Power Supply

Zhang, Peng; Wu, Shuqun; Tan, Xiao; Tu, Yuan‐Kuang; Pei, Xuebing; Gou, Jianmin; Zhou, Kun; Yang, Yong

doi:10.1109/tps.2014.2309681

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…The stable plasma jet generated under DC discharge conditions may have higher treatment efficiency, so it is necessary to study the generation of the glow-type APPJ without airflow under DC discharge conditions. In order to meet the needs of large-scale industrial applications, it is necessary to expand the plasma jet on a large scale to generate a large area of plasma [19][20][21][22][23][24][25]. In this paper, the space electric field distribution of the discharge structure is optimized, and a glow-type APPJ and an array jet capable of large-area treatment are formed.…”

Section: Introductionmentioning

confidence: 99%

Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air

Liu

Zheng

2019

Plasma Sci. Technol.

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In order to form an atmospheric-pressure plasma jet without airflow, a needle-ring electrode structure is proposed in this paper. When heteropolar potentials are applied to a needle and a ring, a marked electric field strength enhancement around the needle's pointed end has been found. When the same potential is applied to both the needle and the ring, the lateral electric field strength for the needle can be weakened. By using the above two methods, an increase of the difference between the pointed end electric field strength and the lateral one is achieved and stable plasma jets are formed. A symmetrical space electric field distribution is established at the pointed end of the needles when several sets of heteropolar needle-ring electrodes are uniformly arranged, which is conducive to forming a uniform array plasma jet. Under DC discharge conditions, a safe and stable plasma jet of high density and an array plasma jet are successfully achieved.

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Section: Introductionmentioning

confidence: 99%

Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air

Liu

Zheng

2019

Plasma Sci. Technol.

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“…The factors that play an important role in inactivating microorganisms in water when a spark discharge is generated, are the generation of strong ultraviolet radiation, high intensity electrical field, free radicals, shock waves and metal nanoparticles produced as a result of electrode deterioration 21 – 23 . The energy is stored in plasma in the form of ionization, excitation, and kinetic energy of random particle movement.…”

Section: Introductionmentioning

confidence: 99%

Inactivation of Staphylococcus aureus in water by pulsed spark discharge

Zheng¹

2017

Sci Rep

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A pulsed spark plasma discharge system was developed and tested as an energy efficient water sterilization method. A 5 log10 reduction on Staphylococcus aureus concentration of 108 CFU/ml was obtained. Complete inactivation was achieved for concentration of 106 CFU/ml. Of the various factors generated by an underwater spark discharge, ultraviolet radiation plays a major role. The inactivation was completely suppressed by the addition of 30 mg/L of a soluble sunscreen, Benzophenone-9. Results obtained using the pulsed spark plasma discharge showed that this system has several advantages, such as high energy efficiency, absence of harmful by-products and portability, over the conventional sterilization methods.

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“…In most cases, the plasma configuration consists of only one plasma jet with a size of micrometers to millimeters, which is difficult to realize in large-scale applications or parallel processes and results in low efficiency. An alternative is to integrate many atmospheric plasma jets together to form an atmospheric pressure plasma jet array [11][12][13][14][15]. However, the interaction dynamics of multiple plasma jets in an atmospheric plasma jet array is complicated and plays an important role in determining the chemical species and the uniformity of the downstream treatment.…”

Section: Introductionmentioning

confidence: 99%

Low temperature atmospheric microplasma jet array for uniform treatment of polymer surface for flexible electronics

Wang

Chen

et al. 2017

J. Micromech. Microeng.

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In this paper, the uniformity of polymer film etching by an atmospheric pressure He/O2 microplasma jet array (μPJA) is first investigated with different applied voltage. Plasma characteristics of μPJA were recorded by optical discharge images. Morphologies and chemical compositions of polymer film etched by μPJA were analyzed by optical microscopy, scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS) and x-ray photoelectron spectroscopy (XPS). By increasing the applied voltage from 8.5 kV to 16.4 kV, the non-uniformity of the luminous intensity of the plasma jets increases. It is interesting that the plasma treated regions are actually composed of an etched region and modification region, with distinct morphologies and chemical compositions. The diameters of the etched parylene-C film show the increase of non-uniformity with higher applied voltage. SEM results show that the non-uniformity of surface morphologies of both the modification regions and etched regions increases with the increase of applied voltage. EDS and XPS results also present the significant effect of higher applied voltage on the non-uniformity of surface chemical compositions of both modification and etched regions. The Coulomb interaction of the streamer heads and the hydrodynamic interaction between the plasma jets and the surrounding air are considered to be responsible for this phenomenon. The results shown in this work can help improve the processing quality of polymer film etched by an atmospheric pressure microplasma jet array and two applications are demonstrated to illustrate the uniform downstream surface treatment.

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A Novel Room-Temperature Air Plasma Jet Array Driven by DC Power Supply

Cited by 6 publications

References 6 publications

Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air

Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air

Inactivation of Staphylococcus aureus in water by pulsed spark discharge

Low temperature atmospheric microplasma jet array for uniform treatment of polymer surface for flexible electronics

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