Characterization of stable brush-shaped large-volume plasma generated at ambient air

Tang, Jie; Cao, Wenqing; Zhao, Wei; Wang, Yishan; Duan, Yixiang

doi:10.1063/1.3672511

Cited by 45 publications

(25 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Another source of electron losses is electron affinity to negative oxygen ions near the water. The electron density n e can be estimated from electrical parameters of the discharge [10]: n e = j/(Eμ e e), where j is the current density, E is the electric field, μ e is the electron mobility, and e is the elementary charge constant. The electron mobility μ e is 4.3 × 10 2 cm 2 /(V • s) for argon at atmospheric pressure [31].…”

Section: Results and Discussion -A) Physical Appearancementioning

confidence: 99%

Characterization of a DC-driven microplasma between a capillary tube and water surface

Lü

Zhong

et al. 2013

EPL

View full text Add to dashboard Cite

A microplasma generated between a stainless-steel capillary and water surface in ambient air with flowing argon as working gas appears as a bright spot at the tube orifice and expands to form a larger footprint on the water surface, and the dimensions of the bell-shaped microplasma are all below 1 mm. The electron density of the microplasma is estimated to be ranging from 5.32 × 10 9 cm −3 to 2.02 × 10 14 cm −3 for the different operating conditions, which is desirable for generating abundant amounts of reactive species. A computational technique is adopted to fit the experimental emission from the N2 second positive system with simulation results. It is concluded that the vibrational temperature (more than 2000 K) is more than twice the gas temperature (more than 800 K), which indicates the non-equilibrium state of the microplasma. Both temperatures showed dependence on the discharge parameters (i.e., gas flow and discharge current). Such a plasma device could be arranged in arrays for applications utilizing plasmainduced liquid chemistry.

show abstract

Section: Results and Discussion -A) Physical Appearancementioning

confidence: 99%

Characterization of a DC-driven microplasma between a capillary tube and water surface

Lü

Zhong

et al. 2013

EPL

View full text Add to dashboard Cite

show abstract

“…Compared with the helium jet, the plasma plume length is not satisfactory with argon used as the working gas 25 . Therefore, one of the challenges that currently face plasma research is how to generate a longer plasma plume in inexpensive gases 28 .…”

mentioning

confidence: 99%

Improved performance of a barrier-discharge plasma jet biased by a direct-current voltage

Zhang

Jia

et al. 2016

Sci Rep

View full text Add to dashboard Cite

One of the challenges that plasma research encounters is how to generate a large-scale plasma plume at atmospheric pressure. Through utilizing a third electrode biased by a direct-current voltage, a longer plasma plume is generated by a plasma jet in dielectric barrier discharge configurations. Results indicate that the plume length increases until it reaches the third electrode with increasing the bias voltage. By fast photography, it is found that the plume consists of two types of streamers under the influence of the bias voltage, which develops from a guided streamer to a branching one with leaving the tube opening. The transition from the guided streamer to the branching one can be attributed to the electric field and the air/argon fraction.

show abstract

“…From the V – I characteristics of DC discharge for all the cases, the breakdown potential is approximately determined to be 900 V and rather low in contrast with that obtained from the Paschen's curve depicted in Figure S1a (Supporting Information) . The sustaining voltage located in the flat area of V – I curve for all the cases is around 500 V and far below that without preionization in our previous work …”

Section: Resultsmentioning

confidence: 44%

A Highly Cost‐Efficient Large‐Scale Uniform Laminar Plasma Jet Array Enhanced by V–I Characteristic Modulation in a Non‐Self‐Sustained Atmospheric Discharge

Wang

Lei

et al. 2020

Advanced Science

Self Cite

View full text Add to dashboard Cite

Developing cost‐efficient large‐scale uniform plasma jets represents a significant challenge for high performance in material processing and plasma medicine. Here, a V–I characteristic modulation approach is proposed to reduce the discharge power and increase the plasma scale and chemical activity in non‐self‐sustained atmospheric direct‐current discharges. The electric field in discharge space is optimized to fundamentally empower simultaneously initiating all discharge cells far below Townsend breakdown potential and stably sustaining each plasma jet at low voltage. These strategies create a crucial step to fabricating a flexible and compact low‐power large‐scale uniform laminar plasma jet array (LPJA) with high activity in cheap argon. The mechanisms behind the discharge enhancement are revealed by combining V–I characteristic examination and a modulation model. Compared with conventional arrays, this LPJA possesses the widest size (90 mm) and raises its uniformity from 30% to 97%. Comparing different discharge modes shows that the LPJA scale is surprisingly increased nearly by 4 times with the discharge power reduced from 7.4 to 4.8 W. The methodology provides a highly cost‐efficient roadmap to break through the bottleneck of restricting low‐power discharge, large‐gap discharge, large‐scale discharge, parallel‐multi‐electrode discharge, and uniform discharge together. This advance will meet the urgent need for various plasma applications.

show abstract

Characterization of stable brush-shaped large-volume plasma generated at ambient air

Cited by 45 publications

References 26 publications

Characterization of a DC-driven microplasma between a capillary tube and water surface

Characterization of a DC-driven microplasma between a capillary tube and water surface

Improved performance of a barrier-discharge plasma jet biased by a direct-current voltage

A Highly Cost‐Efficient Large‐Scale Uniform Laminar Plasma Jet Array Enhanced by V–I Characteristic Modulation in a Non‐Self‐Sustained Atmospheric Discharge

Contact Info

Product

Resources

About