Publication detail

Sample Thickness and Edge Proximity Influence Spatial Behavior of Filaments and Treatment Uniformity of RF Cold Atmospheric Pressure Plasma Jet

POLÁŠKOVÁ, K. NEČAS, D. DOSTÁL, L. KLÍMA, M. ZAJÍČKOVÁ, L.

Original Title

Sample Thickness and Edge Proximity Influence Spatial Behavior of Filaments and Treatment Uniformity of RF Cold Atmospheric Pressure Plasma Jet

Type

journal article in Web of Science

Language

English

Original Abstract

The ability of atmospheric pressure plasma jets to treat complex non-planar surfaces is often cited as their advantage over other atmospheric plasmas. However, the effect of complex surfaces on plasma parameters and treatment efficiency has seldom been studied. Herein, we investigate the interaction of the atmospheric pressure plasma slit jet (PSJ) with block polypropylene samples of different thicknesses (5 and 30 mm) moving at two different speeds. Even though the distance between the slit outlet and the sample surface was kept constant, the treatment efficiency of PSJ ignited in the Ar and Ar/O2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Ar/O}_2$$\end{document} gas feeds varied with the sample thickness due to the plasma parameters such as filament count and speed being affected by the different distances of the ground (the closer the ground is, the higher the discharge electric field). On the other hand, the Ar/N2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Ar/N}_2$$\end{document} PSJ diffuse plasma plumes were less affected by the changes in the electric field, and the treatment efficiency was the same for both sample thicknesses. Additionally, we observed a difference in the efficiency and uniformity of the PSJ treatment of the edges and the central areas in some working conditions. The treatment efficiency near the edges depended on the duration of the filament contact, i. e., how long the local electric field trapped the filaments. Conversely, the treatment uniformity near the edges and in the central areas was different if the number of filaments changed rapidly as the discharge moved on and off the sample (the 5 mm samples treated by easily sustained Ar PSJ).

Keywords

Radio frequency atmospheric pressure plasma jet; Plasma filaments; Plasma treatment; Complex surfaces; Fast camera imaging

Authors

POLÁŠKOVÁ, K.; NEČAS, D.; DOSTÁL, L.; KLÍMA, M.; ZAJÍČKOVÁ, L.

Released

1. 1. 2025

Publisher

SPRINGER

Location

NEW YORK

ISBN

1572-8986

Periodical

Plasma Chemistry and Plasma Processing

Year of study

45

Number

1

State

United States of America

Pages from

49

Pages to

68

Pages count

20

URL

https://link.springer.com/article/10.1007/s11090-024-10517-0

Full text in the Digital Library

http://hdl.handle.net/11012/250908

BibTex

@article{BUT191214,
  author="Kateřina {Polášková} and David {Nečas} and Lukáš {Dostál} and Miloš {Klíma} and Lenka {Zajíčková}",
  title="Sample Thickness and Edge Proximity Influence Spatial Behavior of Filaments and Treatment Uniformity of RF Cold Atmospheric Pressure Plasma Jet",
  journal="Plasma Chemistry and Plasma Processing",
  year="2025",
  volume="45",
  number="1",
  pages="49--68",
  doi="10.1007/s11090-024-10517-0",
  issn="1572-8986",
  url="https://link.springer.com/article/10.1007/s11090-024-10517-0"
}