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Changes in Properties of Dielectric Barrier Discharge Plasma Jets for Different Gases and for Insulating and Conducting Transfer Plates

Authors
  • do Nascimento, Fellype1
  • Moshkalev, Stanislav1
  • Machida, Munemasa2
  • 1 State University of Campinas, Center for Semiconductor Components and Nanotechnologies, C. P. 6101, Campinas, CEP 13083-870, Brazil , Campinas (Brazil)
  • 2 State University of Campinas, Instituto de Física “Gleb Wataghin”, Campinas, CEP 13083-859, Brazil , Campinas (Brazil)
Type
Published Article
Journal
Brazilian Journal of Physics
Publisher
Springer US
Publication Date
Mar 07, 2017
Volume
47
Issue
3
Pages
278–287
Identifiers
DOI: 10.1007/s13538-017-0492-1
Source
Springer Nature
Keywords
License
Yellow

Abstract

Dielectric barrier discharge (DBD) plasma jets have been studied extensively in recent years because of its wide range of applications. DBD plasmas can be produced using many different gases and can be applied to a broad variety of surfaces and substrates. This work provides comparisons of DBD plasmas generated using argon (Ar), helium (He), and nitrogen (N2), as well as their mixtures with water vapor in order to know how some plasma properties are affected by the use of different gases. All plasmas were studied in two different conditions: using a transfer plate made of a conductive material and using a transfer plate made of an insulating one. It was observed that the process of Penning ionization of nitrogen molecules by direct collisions with metastable atoms and molecules is evident and significant only in plasmas that use He as the working gas, which means that He atoms in metastable states have greater ability to transfer energy to molecules of nitrogen in the plasma. The collisions of metastable He with N2 molecules determine the vibrational temperature (Tvib) values in He plasmas, while in Ar and N2 plasmas, the Tvib values are determined mainly by collisions of electrons with N2 molecules. It was noticed that the use of an insulating or a conducting transfer plate as the sample holder affects the results of adhesion between poly(dimethylsiloxane) samples, and it is mainly due to the differences in the plasma power, with a higher plasma power leading to better adhesion.

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