A Low-Power, Atmospheric Pressure, Pulsed Plasma Source for Molecular Emission Spectrometry

Jin, Zhe; Su, Yongxuan; Duan, Yixiang

doi:10.1021/ac000678x

Cited by 49 publications

(35 citation statements)

References 19 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 has spatial structure very similar to that typical of low-pressure glow discharges. 17 This close similarity not only confirms the experimental observations that atmospheric glow discharges can indeed be generated and sustained at dc, [20][21][22][23][24][25][26][27][28][29] but also allows understanding of low-pressure glow discharges to be extended for application to atmospheric glow discharges. Despite of the FIG.…”

Section: Structural Characteristics Of DC Apgdsupporting

confidence: 69%

“…Given that data for the cathode electric field are not available for many dc APGD experiments, we also consider the J/E g ratio for the entire interelectrode space with E g calculated as V g /L, and this is plotted versus the current density in Fig. 10͑b͒ in which data measured for three different experiments 10,22,38 are also included. For the dc APGD experiment in Ref.…”

Section: Relationships Among Key Cathode Fall and Electrical Paramentioning

confidence: 99%

“…Experiments in Ref. 22 employ platinum electrodes, whereas those in Refs. 10 and 38 use gold electrodes.…”

Section: Relationships Among Key Cathode Fall and Electrical Paramentioning

confidence: 99%

See 2 more Smart Citations

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Shi

Kong

2003

Journal of Applied Physics

View full text Add to dashboard Cite

Atmospheric pressure glow discharges are attractive for a wide range of material-processing applications largely due to their operation flexibility afforded by removal of the vacuum system. These relatively new atmospheric plasmas are nonequilibrium plasmas with gas temperature around 100°C and electron temperature in the 1-10 eV range. Their appearance is characteristically diffuse and uniform, and their temporal features are repetitive and stable. Of the reported numerical studies of atmospheric glow discharges, most are based on the hydrodynamic approximation in which electrons are assumed to be in equilibrium with the local electric field. Spectroscopic and electrical measurements suggest however that the cathode fall region is fundamentally nonequilibrium. To this end we consider a hybrid model that treats the cathode fall region kinetically but retains a hydrodynamic description for the region between the thin cathode fall layer and the anode. Using this hybrid model, a helium discharge system excited at dc is studied numerically for a very wide current density range that spans from Townsend dark discharge, through normal glow discharge, to abnormal glow discharge. Numerical results confirm many distinct characteristics of glow discharges and compare well with that of low-pressure glow discharges. Generic relationships, such as that between the electric field and the current density, are also established and are in good agreement with experimental data. This hybrid model is simple and insightful as a theoretical tool for atmospheric pressure glow discharges.

show abstract

Section: Structural Characteristics Of DC Apgdsupporting

confidence: 69%

Section: Relationships Among Key Cathode Fall and Electrical Paramentioning

confidence: 99%

See 1 more Smart Citation

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Shi

Kong

2003

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…In other words, the discharge consumption is only about 70%-40% of the total power used in the cases mentioned above. It should also be mentioned that the power consumption on the argon plasma source could be further reduced when it is operated in a pulse mode, 22 which can also generate stable plasmas. The very low power consumption of such an atmospheric argon plasma brush provides many unique advantages in practical applications including battery-powered operation and use in large-scale applications.…”

Section: A Plasma Generation Stabilization and Characteristicsmentioning

confidence: 99%

Cold plasma brush generated at atmospheric pressure

Duan

Huang²,

Yu³

2007

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

A cold plasma brush is generated at atmospheric pressure with low power consumption in the level of several watts (as low as 4 W) up to tens of watts (up to 45 W). The plasma can be ignited and sustained in both continuous and pulsed modes with different plasma gases such as argon or helium, but argon was selected as a primary gas for use in this work. The brush-shaped plasma is formed and extended outside of the discharge chamber with typical dimension of 10-15 mm in width and less than 1.0 mm in thickness, which are adjustable by changing the discharge chamber design and operating conditions. The brush-shaped plasma provides some unique features and distinct nonequilibrium plasma characteristics. Temperature measurements using a thermocouple thermometer showed that the gas phase temperatures of the plasma brush are close to room temperature (as low as 42 degrees C) when running with a relatively high gas flow rate of about 3500 ml/min. For an argon plasma brush, the operating voltage from less than 500 V to about 2500 V was tested, with an argon gas flow rate varied from less than 1000 to 3500 ml/min. The cold plasma brush can most efficiently use the discharge power as well as the plasma gas for material and surface treatment. The very low power consumption of such an atmospheric argon plasma brush provides many unique advantages in practical applications including battery-powered operation and use in large-scale applications. Several polymer film samples were tested for surface treatment with the newly developed device, and successful changes of the wettability property from hydrophobic to hydrophilic were achieved within a few seconds.

show abstract

“…16,21 Compared with a dc mode, the pulse mode of discharge reduced the power consumption by adjusting the duty cycle (11:1). The average operational power of the detector was kept at <0.2 W, as described in ref 21. Therefore, the microplasma source could be powered with a small dry-cell battery.…”

mentioning

confidence: 99%

Nitrogen Microplasma Generated in Chip-Based Ingroove Glow Discharge Device for Detection of Organic Fragments by Optical Emission Spectrometry

Meng

Duan

2015

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

In this study, nitrogen was successfully used to maintain the microplasma discharge to excite and detect organic compounds for the first time. A new nitrogen glow discharge microplasma-generated in-chip-based ingroove device was developed and applied as the excitation source for optical emission spectrometry. The unique ingroove design of the discharge chamber can provide good stability and sensitivity for nitrogen microplasma to detect trace organic samples. Unlike argon/helium microplasmas, the nitrogen microplasma has a strict demand on the material of electrodes, especially cathodes. We tested the effects of four common electrode materials from various aspects and obtained the most appropriate material for nitrogen glow discharge, namely, platinum. We also studied the excitation and detection mechanism of organic compounds in nitrogen microplasma and confirmed that the main means of excitation in nitrogen plasma was through energy transfer rather than penning ionization. Several organic compounds were directly injected and detected in the optimized working conditions with the limits of detection at the hundreds of picograms level. Because of the portable nitrogen generators handily and commercially available, this detection system with nitrogen as the discharge gas can overcome the limitation of noble gas supply. In addition, the advantages of small size, low energy consumption, good stability, and reproducibility demonstrate that the nitrogen ingroove microplasma source can be applied in a portable detector for on-site and real-time spectrometry detection.

show abstract

A Low-Power, Atmospheric Pressure, Pulsed Plasma Source for Molecular Emission Spectrometry

Cited by 49 publications

References 19 publications

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Cold plasma brush generated at atmospheric pressure

Nitrogen Microplasma Generated in Chip-Based Ingroove Glow Discharge Device for Detection of Organic Fragments by Optical Emission Spectrometry

Contact Info

Product

Resources

About