Investigation of mode interconversion for interfacial pattern formation through plasma–surface interaction

Abstract

The appropriate understanding of the plasma-surface interaction is crucial in optimizing the atmospheric pressure plasma jet (APPJ) to suit a particular application. In this study, we mainly focus on the behavior of mode interconversion for interfacial patterns regarding APPJ interacting with a indium tin oxide (ITO) glass substrate. By regulating the pulse voltage, annular interfacial pattern formation on ITO surface displays two types of modes, that is, the diffuse pattern and the streamer pattern. Furthermore, these two modes are not independent and are trans-2017BSHYDZZ11), the Natural Science Foundation of Shaanxi Province (Grant No. 2019JQ220), and the State F I G U R E 8 A schematic map for the pattern mode interconversion between diffuse and streamer by controlling the voltage and introducing N 2 and O 2 . The time-integrated images of interfacial pattern are taken with 100 µs gating time and 20 accumulations LIU ET AL.

Experimental investigation of a ns-pulsed argon plasma jet for the fast desorption of weakly volatile organic compounds deposited on glass substrates at variable electric potential

“…The appearance of concentric ring patterns has been also reported in another recent work studying a µs-pulsed He APPJ impinging on a floating-potential plate [62]. ICCD images of the total and the filtered SIW emission, recorded at V P = 8.5 kV and 10 kV, provided a solid evidence of the formation of annular ring patterns on the dielectric plate resulting from diffuse (at 8.5 kV) and streamer modes (at 10 kV), in agreement with what was discussed previously.…”

“…However, the formation of other nitrogen ions such as N 4 + (and Ar ions such as Ar + and Ar 2 + ) is possible [53,55]. Such ions can contribute to the formation of the ring patterns around the central spot shown in figure 8, as suggested for N 2 + (B) in [62]. Their production, similarly to that of other species studied when analyzing figure 5, should be more significant when using a grounded plate due to a higher power injected into the plasma.…”

Influence of different O2/H2O ratios on He atmospheric pressure plasma jet impinging on a dielectric surface

“…The radial electric field keeps the outward direction. The addition of both O 2 and H 2 O can change the radial electric field direction in the center area of the dielectric surface, which changes the discharge pattern on the dielectric surface from a ringshape to a solid-disk shape [23,26,63]. The peak value of the electric field decreases from 7.66 kV cm −1 to 6.39 kV cm −1 as the R changes from 1:9 to 9:1.…”

Complicated streamer dynamics in petal‐like patterns formed on the substrate downstream of an argon plasma jet

“…[32][33][34] Sometimes, they propagate anisotropically, leading to the formation of a star-shaped pattern. [35][36][37] For the anisotropic surface streamers, after propagating a certain distance, they may split and then propagate along a circular arc. Under such circumstances, a single-ring or even a triple-ring pattern can be observed on the substrate.…”