A Filamentary Plasma Jet Generated by Argon Dielectric-Barrier Discharge in Ambient Air

Li, Jing; Lei, Bingying; Wang, Jing; Zhang, Tong‐Yi; Tang, Jie; Wang, Yishan; Zhao, Wei; Duan, Yixiang

doi:10.1109/tps.2019.2916187

Cited by 18 publications

(14 citation statements)

References 39 publications

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“…it can be seen that the

values for the wire configuration are higher than those obtained with the mesh. In any case, such values are in agreement with ones reported in the literature for Ar plasma jets impinging on a dielectric surface [ 41 , 47 , 48 ]. Despite the difference observed in the values of

for the different configurations, both curves present similar trends as a function of d .…”

Section: Results and Discussionsupporting

confidence: 91%

“…Rotational and vibrational temperature values (

and

, respectively) of

molecules were assessed using spectroscopic measurements. In order to obtain those

and

values, we used spectroscopic emissions from the

second positive system,

, with

, in the wavelength range of 362 nm to 382 nm [ 38 , 39 , 40 , 41 ]. Simulations of emission spectra were carried out using an appropriate software (massiveOES, for instance) [ 42 , 43 ].…”

Section: Materials and Methodsmentioning

confidence: 99%

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Different Radial Modification Profiles Observed on APPJ-Treated Polypropylene Surfaces according to the Distance between Plasma Outlet and Target

et al. 2022

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The plasma jet transfer technique relies on a conductive wire at floating potential, which, upon entering in contact with a primary discharge, is capable of igniting a small plasma plume at the distal end of a long flexible plastic tube. In this work, two different long tube configurations were employed for the surface modification of polypropylene (PP) samples using argon as the working gas. One of the jet configurations has a thin copper (Cu) wire, which was installed inside the long tube. In the other configuration, the floating electrode is a metallic mesh placed between two plastic tubes in a coaxial arrangement. In the first case, the tip of the Cu wire is in direct contact with the working gas at the plasma outlet, whereas, in the second, the inner plastic tube provides an additional dielectric barrier that prevents the conductor from being in contact with the gas. Water contact angle (WCA) measurements on treated PP samples revealed that different surface modification radial profiles are formed when the distance (d) between the plasma outlet and target is changed. Moreover, it was found that the highest WCA reduction does not always occur at the point where the plasma impinges the surface of the material, especially when the d value is small. Through X-ray photoelectron spectroscopy (XPS) analysis, it was confirmed that the WCA values are directly linked to the oxygen-functional groups formed on the PP surfaces after the plasma treatment. An analysis of the WCA measurements along the surface, as well as their temporal evolution, together with the XPS data, suggest that, when the treatment is performed at small d values, the plasma jet removes some functional groups at the point where the plasma hits the surface, thus leading to peculiar WCA profiles.

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“…it can be seen that the

for the different configurations, both curves present similar trends as a function of d .…”

Section: Results and Discussionsupporting

confidence: 91%

“…Rotational and vibrational temperature values (

and

, respectively) of

molecules were assessed using spectroscopic measurements. In order to obtain those

and

values, we used spectroscopic emissions from the

second positive system,

, with

, in the wavelength range of 362 nm to 382 nm [ 38 , 39 , 40 , 41 ]. Simulations of emission spectra were carried out using an appropriate software (massiveOES, for instance) [ 42 , 43 ].…”

Section: Materials and Methodsmentioning

confidence: 99%

Different Radial Modification Profiles Observed on APPJ-Treated Polypropylene Surfaces according to the Distance between Plasma Outlet and Target

et al. 2022

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“…In summary, when the APPJ impinges on the copper target both T rot and T vib are always smaller for the mesh configuration they tend to not differ significantly when the configuration is changed and when the target is the glass plate. Furthermore, the T rot and T vib values obtained in this work are in agreement with others reported in the literature for APPJs that employ Ar as the working gas [41,42,43].…”

Section: Spectroscopic Emissions and Thermal Parameterssupporting

confidence: 91%

Different configurations of transferred atmospheric pressure plasma jet and their application to polymer treatment

Nascimento¹,

Kostov²,

Quade³

et al. 2022

Preprint

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The employment of atmospheric pressure plasma jets (APPJs) in a large sort of applications is limited by the adversities related to the size of the treated area and the difficulty to reach the target. The use of devices that employ long tubes in their structure has contributed significantly to overcome these challenges. In this work, a comparison between two different plasma systems employing the jet transfer technique is presented. The main difference between the two devices is how the long plastic tube was assembled. The first one uses a copper wire placed inside a long plastic tube. The other device has a metallic mesh installed in a concentric arrangement between two coaxial plastic tubes. As a result, the two APPJ systems exhibit different properties, with the wire assembly being more powerful, also presenting higher values for the electrical current and rotational temperature when compared to the mesh mounting. X-ray photoelectron spectroscopy (XPS) demonstrates that both configurations were capable of inserting O-containing functional groups on the polypropylene (PP) surface. However, the transferred plasma jet with wire assembly was able to add more functional groups on the PP surface. The results from XPS analysis were corroborated with water contact angle measurements (WCA), being that lower WCA values were obtained when the PP surface presented higher amounts of O-containing groups. Surface morphology evaluation showed that the plasma treatment tends to slightly increase the surface roughness of the PP samples with both wire and mesh configurations. Furthermore, the findings in this work suggest that the APPJ with wire configuration is more appropriate for material treatments, while the transferred jet with mesh arrangement tends to present lower electrical current values, which makes it more suitable for biological applications.

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“…Furthermore, the

{T}_{\mathrm{rot}}

and

{T}_{\mathrm{vib}}

values obtained in this work are in agreement with others reported in the literature for APPJs that employ Ar as the working gas. [ 43–45 ]…”

Section: Resultsmentioning

confidence: 99%

Different configurations of transferred atmospheric pressure plasma jet and their application to polymer treatment

Nascimento

Quade

Canesqui

et al. 2022

Contributions to Plasma Physics

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The employment of atmospheric pressure plasma jets (APPJs) in a large sort of applications is limited by the adversities related to the size of the treated area and the difficulty to reach the target. The use of devices that employ long tubes in their structure has contributed significantly to overcome these challenges. In this work, two different plasma systems employing the jet transfer technique are compared. The main difference between the two devices is how the long plastic tube was assembled. The first one uses a copper wire placed inside a long plastic tube. The other device has a metallic mesh installed in a concentric arrangement between two coaxial plastic tubes. As a result, the two APPJ systems exhibit different properties, with the wire assembly being more powerful, also presenting higher values for the electrical current and rotational temperature when compared to the mesh mounting. X-ray photoelectron spectroscopy (XPS) demonstrates that both configurations were capable of inserting O-containing functional groups on the polypropylene (PP) surface. However, the transferred plasma jet with wire assembly was able to add more functional groups on the PP surface. The results from XPS analysis were corroborated with water contact angle measurements (WCA), being that lower WCA values were obtained when the PP surface presented higher amounts of O-containing groups. Furthermore, the results suggest that the APPJ with wire configuration is more appropriate for material treatments, while the transferred jet with mesh arrangement tends to present lower electrical current values, being more suitable for biological applications.

show abstract

A Filamentary Plasma Jet Generated by Argon Dielectric-Barrier Discharge in Ambient Air

Cited by 18 publications

References 39 publications

Different Radial Modification Profiles Observed on APPJ-Treated Polypropylene Surfaces according to the Distance between Plasma Outlet and Target

Different Radial Modification Profiles Observed on APPJ-Treated Polypropylene Surfaces according to the Distance between Plasma Outlet and Target

Different configurations of transferred atmospheric pressure plasma jet and their application to polymer treatment

Different configurations of transferred atmospheric pressure plasma jet and their application to polymer treatment

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