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

Li, Xuechen; Zhang, Panpan; Jia, Pengying; Dong, Lifang

doi:10.1038/srep35653

Cited by 14 publications

(5 citation statements)

References 36 publications

(42 reference statements)

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“…At last (moment h), the streamer reaches the plate vicinity and quenches. The similar behavior of positive streamers has been reported in [33,44]. In a word, the positive discharge is filamentary, which results from a positive streamer regime.…”

Section: Resultssupporting

confidence: 80%

A diffuse argon plume generated downstream of an atmospheric pressure plasma jet equipped with a positively biased electrode

Zhao¹,

Wu²,

He³

et al. 2021

J. Phys. D: Appl. Phys.

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Compared with the diffuse mode of helium plasma jets, a filamentary mode is normally produced in the plasma plume with less expensive inert gas, such as argon, which is undesirable because intense discharge in the filamentary mode may cause damage to fragile samples. Many efforts have been attempted to realize the diffuse mode of an argon plasma jet. In this paper, the diffuse mode is realized in an atmospheric pressure argon plasma jet with increasing biased voltage (V b) applied to a downstream plate electrode. Results show that the diffuse mode transits from the filamentary mode with the increase of V b. Waveforms of voltage, current and integrated light emission reveal that the filament originates from a positive discharge with a needle anode, while the diffuse mode results from negative discharges with a needle cathode, which consist of a Trichel-pulse phase and a slower-varying phase. By fast photography, the positive discharge is attributed to a streamer regime, whereas the negative discharges belong to a Townsend-discharge regime. From optical emission spectroscopy, electron density, electron excitation temperature, vibrational temperature, and rotational temperature are studied as functions of V b.

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Section: Resultssupporting

confidence: 80%

A diffuse argon plume generated downstream of an atmospheric pressure plasma jet equipped with a positively biased electrode

Zhao¹,

Wu²,

He³

et al. 2021

J. Phys. D: Appl. Phys.

Self Cite

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“…For negative polarity high voltage pulses we observed an I 2 current of around −7.5 mA peak value during the falling edge and the peak value of I 2 current during the rising edge is now around −9.6 mA (compared with 0.93 mA for the free plasma jet). This very different behaviour of free plasma jets and plasma jets impinging on conductive targets was argued by some groups, including us [58][59][60][61][62][63]. Figure 7 shows the mass spectra of the plasma source under investigation, using both residual gas analysis mode and ions analysis modes.…”

Section: Influence Of a Third Electrodementioning

confidence: 99%

Time Behaviour of Helium Atmospheric Pressure Plasma Jet Electrical and Optical Parameters

et al. 2017

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Low temperature plasma jets gained increased interest in the last years as a potential device in many life science applications, including here human or veterinary medicine. Standardisation of plasma sources and biological protocols are necessary for quality assurance reasons, due to the fact that this type of atmospheric pressure plasma source is available in multiple configurations and their operational parameters span also on a broad range of items, such as all characteristics of high voltage pulses used for gas breakdown, geometrical characteristics, gas feed composition and conductive or biological target characteristics. In this paper we present results related to electrical, optical and molecular beam mass spectrometry diagnosis of a helium plasma jet, emphasising the influence of various operational parameters of the high voltage pulses on plasma jet properties. Discussion on physical parameters that influence the biological response is included, together with important results on plasma sources statistical behaviour until reaching a quasi-stationary working regime. The warm-up period of the plasma jet, specific to many other plasma sources, must be precisely known and specified whenever the plasma jets are used as a tool for life science applications.

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“…As the literature has previously reported [34], a high voltage for the generation of plasma is a key parameter for the ionization efficiency of a DBD-based ion source. When the onset voltage (i.e., 3.3 kV) for generating the plasma was reached, the analyte's ion signal was obtained.…”

Section: Optimization Of the Parametersmentioning

confidence: 99%

A Facile Determination of Herbicide Residues and Its Application in On-Site Analysis

Sun,

Tang,

Chen

et al. 2024

Foods

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Abuse of herbicides in food safety is a vital concern that has an influence on the sustainable development of the world. This work presents, a modified ionization method with separation of the sample and carrier gas inlets, which was utilized for efficient ionization and analyte transfer of herbicides in crops. The working parameters of voltage, injective distance, desorption temperature, and the carrier gas flow rate were optimized to achieve the high efficiency of the transfer and ionization of the analyte. When it was applied in the analysis of herbicides in laboratory, the method exhibited excellent performance in achieving the quantitative detection of herbicides in solutions and residues spiked in an actual matrix with a limit of quantification of 1–20 μg/kg and relative standard deviations of less than 15%. Although a simple QuEchERS process was used, the programmable heating platform ensured efficient gasification and transfer of the target analyte, with the advantages of high speed and selectivity, avoiding the noted matrix effect. The method exhibited a relatively acceptable performance by using air as the discharged gas (open air). It could be used to monitor herbicide residues in the growth stage via on-site non-destructive analysis, which obtained low LODs by dissociating the herbicides from the crops without any pretreatment. It showed great potential for the supervision of the food safety market by achieving non-destructive detection of crops anytime and anywhere. This finding may provide new insights into the determination of pesticide emergence and rice quality assessment.

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

Cited by 14 publications

References 36 publications

A diffuse argon plume generated downstream of an atmospheric pressure plasma jet equipped with a positively biased electrode

A diffuse argon plume generated downstream of an atmospheric pressure plasma jet equipped with a positively biased electrode

Time Behaviour of Helium Atmospheric Pressure Plasma Jet Electrical and Optical Parameters

A Facile Determination of Herbicide Residues and Its Application in On-Site Analysis

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