Optical Diagnosis of Atmospheric Pressure Gas-Liquid Diffuse Discharge Excited by Nanosecond Pulse Voltage

In this paper, A bipolar high voltage pulse with 20 ns rising time was employed to generate diffuse gas-liquid diffuse discharge in helium, and dielectric-free electrode configuration is used to generate room temperature plasma in small gas flow rate, which can be considered as a effective method to reduce the production cost. Discharge images, waveforms of pulse voltage and discharge current, and emission spectra of active species are measured.

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Atmospheric Pressure Room Temperature Plasma Jets Facilitate Oxidative and Nitrative Stress and Lead to Endoplasmic Reticulum Stress Dependent Apoptosis in HepG2 Cells

PLoS ONE ◽

10.1371/journal.pone.0073665 ◽

2013 ◽

Vol 8 (8) ◽

pp. e73665 ◽

Cited By ~ 65

Author(s):

Shasha Zhao ◽

Zilan Xiong ◽

Xiang Mao ◽

Dandan Meng ◽

Qian Lei ◽

...

Keyword(s):

Endoplasmic Reticulum ◽

Endoplasmic Reticulum Stress ◽

Atmospheric Pressure ◽

Hepg2 Cells ◽

Room Temperature ◽

Plasma Jets ◽

Temperature Plasma ◽

Nitrative Stress ◽

Stress Dependent

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The Antimicrobial Activity of an Atmospheric-Pressure Room-Temperature Plasma in a Simulated Root-Canal Model Infected With Enterococcus Faecalis

IEEE Transactions on Plasma Science ◽

10.1109/tps.2010.2078522 ◽

2010 ◽

Vol 38 (12) ◽

pp. 3370-3374 ◽

Cited By ~ 23

Author(s):

Xincai Zhou ◽

Zilan Xiong ◽

Yingguang Cao ◽

Xinpei Lu ◽

Dexi Liu

Keyword(s):

Antimicrobial Activity ◽

Enterococcus Faecalis ◽

Root Canal ◽

Atmospheric Pressure ◽

Room Temperature ◽

Temperature Plasma

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Application of POCOP Pincer Nickel Complexes to the Catalytic Hydroboration of Carbon Dioxide

Catalysts ◽

10.3390/catal8110508 ◽

2018 ◽

Vol 8 (11) ◽

pp. 508 ◽

Cited By ~ 10

Author(s):

Jie Zhang ◽

Jiarui Chang ◽

Ting Liu ◽

Bula Cao ◽

Yazhou Ding ◽

...

Keyword(s):

Atmospheric Pressure ◽

Room Temperature ◽

Nickel Complexes ◽

Active Species ◽

Pincer Complexes ◽

Hydride Complex ◽

Nickel Hydride ◽

Different Types ◽

Reduction Of Co2

The reduction of CO2 is of great importance. In this paper, different types of bis(phosphinite) (POCOP) pincer nickel complexes, [2,6-(R2PO)2C6H3]NiX (R = tBu, iPr, Ph; X = SH, N3, NCS), were applied to the catalytic hydroboration of CO2 with catecholborane (HBcat). It was found that pincer complexes with tBu2P or iPr2P phosphine arms are active catalysts for this reaction in which CO2 was successfully reduced to a methanol derivative (CH3OBcat) with a maximum turnover frequency of 1908 h−1 at room temperature under an atmospheric pressure of CO2. However, complexes with phenyl-substituted phosphine arms failed to catalyze this reaction—the catalysts decomposed under the catalytic conditions. Complexes with iPr2P phosphine arms are more active catalysts compared with the corresponding complexes with tBu2P phosphine arms. For complexes with the same phosphine arms, the catalytic activity follows the series of mercapto complex (X = SH) ≈ azido complex (X = N3) >> isothiocyanato complex (X = NCS). It is believed that all of these catalytic active complexes are catalyst precursors which generate the nickel hydride complex [2,6-(R2PO)2C6H3]NiH in situ, and the nickel hydride complex is the active species to catalyze this reaction.

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Cold Atmospheric Pressure Gliding arc Plasma Jet for Decontamination

Communications in Physics ◽

10.15625/0868-3166/24/3s2/5055 ◽

2016 ◽

Vol 24 (3S2) ◽

pp. 103-108

Author(s):

Do Hoang Tung ◽

Bach Sy Minh ◽

Vu Thi Thom ◽

Lam Thi Huyen Trang ◽

Cao Thi Huong ◽

...

Keyword(s):

Uv Radiation ◽

Atmospheric Pressure ◽

Gas Flow ◽

Room Temperature ◽

Plasma Jet ◽

Plasma Discharge ◽

Arc Plasma ◽

Gliding Arc ◽

Gliding Arc Plasma ◽

Ar Gas

A cold atmospheric pressure gliding arc plasma jet hasbeen developed and applied to disinfection. The size of the plasma output is about 6 mm in diameter and 10 mm in length. Ar gas at a flow rate of 10 slm and 25 W plasma power are used. Plasma discharge is produced between the divergent electrodes and the jet appears as an effluence of the gas flow. When a \textnormal{pseudomonas} culture is placed at 8 mm below the torch for 1minute, where the gas is at room temperature, the bacteria within a 16 mm diameter circle are almost completely killed. As the UV radiation is well below the safety regulation, the bacteria are inactivated by the total effect of UV radiation and others like the reactive species and the charged particles.

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He-Plasma Jet Generation and Its Application for E. coli Sterilization

Journal of Spectroscopy ◽

10.1155/2021/6671531 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Tiejian Liu ◽

Yuxuan Zeng ◽

Xin Xue ◽

Yinyi Sui ◽

Yingying Liang ◽

...

Keyword(s):

Gas Flow ◽

Treatment Time ◽

Water Discharge ◽

Atmospheric Pressure Plasma ◽

Emission Spectra ◽

Plasma Jet ◽

Active Species ◽

Short Treatment ◽

Surface Sterilization ◽

E Coli

Atmospheric pressure plasma jet (APPJ) is a promising technique for the sterilization of pathogenic microorganisms in an ambient environment. In this work, a helium-APPJ was generated by double dielectric barrier discharge and applied to the sterilization of model microorganism in air and water. Discharge characteristics (including waveform and frequency of applied voltage), jet properties (such as feed gas flow rate, jet length, thermal effect, and optic emission spectra), and sterilization performance (in terms of clear/sterilized area, size of plaques, and sterilization efficiency) were investigated. Homogeneous helium plasma jet was generated in an energy-efficient way (18 kHz, 6 kV, 0.08 W) with a 19 mm jet and limited heating. The He-APPJ achieved good sterilization performances within very short treatment time (as short as 30 s). For surface sterilization, the area of clear zone and size of the plaque were 1809 mm2 and 48 mm, respectively, within 5 min treatment. For water sterilization, 99.8% sterilization efficiency was achieved within 5 min treatment. The optic emission spectra suggest that active species such as excited molecules, ions, and radicals were produced in the He-APPJ. The as-produced active species played important roles in the sterilization process.

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Measurement of CS2 Absorption Cross-Sections in the 188–215 nm Region at Room Temperature and Atmospheric Pressure

Applied Spectroscopy ◽

10.1177/0003702820955244 ◽

2020 ◽

Vol 75 (1) ◽

pp. 15-21

Author(s):

Yungang Zhang ◽

Yongda Wang ◽

Yunjie Liu ◽

Xinyu Ai ◽

Zhiguo Zhang ◽

...

Keyword(s):

Ultraviolet Light ◽

Carbon Disulfide ◽

Cross Sections ◽

Atmospheric Pressure ◽

Gas Flow ◽

Room Temperature ◽

Absorption Cross ◽

Experimental Conditions ◽

Factors Affecting ◽

Sulfur Containing

Carbon disulfide, an important sulfur-containing species, has strong absorption lines in the wavelength range of 188 nm to 215 nm. It is difficult to accurately measure the absorption cross sections of carbon disulfide because carbon disulfide will be easily converted into carbon sulfide when it is exposed to ultraviolet light. In this study, the absorption cross sections of carbon disulfide were measured by reducing carbon disulfide conversion. The factors affecting carbon disulfide conversion, including gas flow rate, ultraviolet light intensity, and duration of illumination, were studied to reduce the conversion of carbon disulfide by controlling experimental conditions in the experiment. Finally, the absorption cross sections of carbon disulfide at room temperature and atmospheric pressure were calculated using the absorption spectrum and the carbon disulfide concentration in the absence of carbon disulfide conversion. The wavelengths of 16 absorption peaks on the carbon disulfide absorption cross sections of the vibration change were marked. Carbon disulfide has the maximum absorption cross section of 4.5 × 10–16 cm2/molecule at a wavelength of 198.10 nm.

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