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Dielectric Barrier Discharge (DBD) plasma jets has been studied extensivelyin recent years because of its wide range of applications. DBD plasmas can beproduced using many different gases and can be applied to a broad variety ofsurfaces and substrates. In this work, we provide a comparison of DBD plasmasgenerated using argon (Ar), helium (He) and nitrogen (N2), as well as theirmixtures with water vapor in order to know how some plasma properties areaffected by the use of different gases. All plasmas were studied in twodifferent conditions, using a transfer plate made of a conductive material andusing a transfer plate made of an insulating one. We observed that theprocesses of excitation and ionization of nitrogen molecules by directcollisions with Ar or He are more evident and significant in He plasmas, whichmeans that He atoms in metastable states have greater ability to transferenergy to molecules of nitrogen in the plasma. The collisions of He atoms inmetastable states with N2 molecules determine the vibrational temperature(Tvib) values in He plasmas, while in Ar and N2 plasmas the Tvib values aredetermined mainly by collisions of electrons with N2 molecules.

Experimental analysis of DBD plasma jet properties using different gases and two kinds of transfer plate