Effect of magnetic field on optical emission from cold atmospheric pressure micro-plasma jet

2021 ◽  
Vol 28 (12) ◽  
pp. 123503
Author(s):  
Kalyani Barman ◽  
Mohit Mudgal ◽  
Ramkrishna Rane ◽  
Sudeep Bhattacharjee
Keyword(s):  
Magnetic Field ◽  
Atmospheric Pressure ◽  
Optical Emission ◽  
Plasma Jet

Studying of Plasma- Polymerized Pyrrole at Variable Gas Flow Rates Via Plasma Jet

2021 ◽  
Vol 19 (48) ◽  
pp. 44-51
Author(s):  
Saba Jawad Kadhem
Keyword(s):  
Flow Rate ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Flow Characteristics ◽  
Atmospheric Pressure Plasma ◽  
Optical Emission ◽  
Plasma Jet ◽  
Nonequilibrium Plasma ◽  
Nano Particles ◽  
Vis Spectroscopy

     In this manuscript has investigated the synthesis of plasma-polymerized pyrrole (C4H5N) nano-particles prepared by the proposed atmospheric pressure nonequilibrium plasma jet through the parametric studies, particularly gas flow rate (0.5, 1 and 1.5 L/min). The plasma jet which used operates with alternating voltage 7.5kv and frequency 28kHz. The plasma-flow characteristics were investigated based on optical emission spectroscopy (OES). UV-Vis spectroscopy was used to characterize the  oxidization  state for polypyrrole. The major absorption appears around 464.1, 449.7 and 435.3  nm at the three flow rate of argon gas. The chemical composition and structural properties of the contained samples which synthesized at 0.5 L/min as a argon flow rate were analyzed by scanning electron microscopy (SEM), Fourier transformation infrared spectroscopy (FTIR), Raman spectroscopy and X-ray diffraction (XRD). SEM point to a uniform distribution of polypyrrole (PPY) nanoparticles matrix. XRD technique showed a semicrystalline pattern for PPY)thin film. It is expected, that the high-quality plasma polymer grown by atmospheric pressure plasma jet method contributes to serving as conducting materials.

Electrical and spectral property of cold arc plasma at atmospheric pressure

2012 ◽  
Vol 78 (6) ◽  
pp. 617-620
Author(s):  
YUAN ZHONG-CAI ◽  
SHI JIA-MING ◽  
CHEN ZONG-SHENG ◽  
XU BO
Keyword(s):  
Atmospheric Pressure ◽  
Arc Discharge ◽  
Rotational Temperature ◽  
Molecular Nitrogen ◽  
Atmospheric Pressure Plasma ◽  
Emission Spectra ◽  
Optical Emission ◽  
Plasma Jet ◽  
Ambient Air ◽  
Arc Plasma

AbstractAn atmospheric pressure plasma jet is generated with a cold arc discharge in ambient air. The current-voltage characteristics and optical emission spectra of plasma discharges are investigated. The molecular nitrogen (N2), hydroxyl radical (OH), and oxygen atom (O) are observed and analyzed. Based on the best fit of the simulated spectra of N2 (C3∏u+ − B3∏g+) band and OH (A2∑+ − X2∏) band transition and the experimentally recorded spectra, the rotational temperature and the vibrational temperature of atmospheric pressure cold arc plasma jet (APCAPJ) are estimated.

Polymerization of Maleic Anhydride Induced by Non-Equilibrium Atmospheric Pressure Argon Plasma

2014 ◽  
Vol 670-671 ◽  
pp. 244-248 ◽  
Author(s):  
Jun Yan ◽  
Katsuhiko Hosoi ◽  
Shin-ichi Kuroda
Keyword(s):  
Maleic Anhydride ◽  
Atmospheric Pressure ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Argon Plasma ◽  
Optical Emission ◽  
Plasma Jet ◽  
Ft Ir ◽  
Deposited Films ◽  
Non Equilibrium

The non-equilibrium atmospheric pressure Ar plasma was applied for the polymerization of maleic anhydride (MA). The deposited films were analyzed by using Fourier transform infrared spectroscopy (FT-IR) proving the monomer was successfully polymerized with retaining the functional groups. The intensity of optical emission spectroscopy (OES) of the plasma jet was found to become weaker when the monomer was introduced into the jet. This was interpreted as the result of the energy transfer from the metastable Ar to the monomer. It was proposed that the excited MA changed into π-π* transition state to produce dimer biradicals which initiate the polymerization.

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