Diffuse Coplanar Surface Barrier Discharge in Artificial Air: Statistical Behaviour of Microdischarges

Abstract

Diffuse Coplanar Surface Barrier Discharge (DCSBD) is a novel type of atmospheric-pressure plasma source developed for high-speed large-area surface plasma treatments. The statistical behavior of microdischarges of DCSBD generated in artificial air atmosphere was studied using time-correlated optical and electrical measurements. Changes in behavior of microdischarges are shown for various electrode gap widths and input voltage amplitudes. They are discussed in the light of correlation of the number of microdischarges and the number of unique microdischarges' paths per discharge event.The 'memory effect' was observed in the behavior of microdischarges and it manifests itself in a significant number of microdischarges reusing the path of microdischarges from previous half-period. Surprisingly this phenomenon was observed even for microdischarges of the same half-period of the discharge, where mechanisms other than charge deposition have to be involved. The phenomenon of discharge paths reuse is most pronounced for wide electrode gap width and/or increased input voltage amplitude.

The Effect of Plasma Pretreatment and Cross-Linking Degree on the Physical and Antimicrobial Properties of Nisin-Coated PVA Films

“…Nevertheless, the key role lies in the plasma treatment, as was confirmed for other polymer materials in literature [16,19,22,29]. This corresponds also to our finding, when plasma treatment of our samples led to obtaining an effective layer with suitable nisin adhesion.…”

“…The main advantage of choosing air as the process gas is that it is naturally present in the industrial production lines [26]. Contrary to other dielectric barrier discharges, the DCSBD is capable of generating a macroscopically uniform plasma layer with high power density and energetic efficiency when operated in air [27,28,29]. This enables fast and homogeneous in-line plasma treatment of materials at high-speeds.…”

Areal homogeneity verification of plasma generated by diffuse coplanar surface barrier discharge in ambient air at atmospheric pressure

“…Reduction of the rotational temperature is very important for plasma treatment of heat‐sensitive materials. The difference between rotational/vibrational temperature measured in the filamentary region of the discharge and in the region above the electrodes has already been reported in Čech et al Rotational and vibrational temperatures for single microfilament of DCSBD plasma have been investigated also in artificial air and under different humidity conditions . With the change of different parameters, the rotational and vibrational temperatures also change.…”

Ambient air plasma pre‐treatment of non‐woven fabrics for deposition of antibacterial poly (l‐lactide) nanoparticles

“…The DCSBD ambient air plasma (Roplass s.r.o., Czech Rep.) consists of many H‐shaped micro‐discharges, as shown in Figure b . The micro‐discharges “move” visually on the alumina ceramic surface and create a macroscopically homogeneous, diffuse, thin (0.3 mm) layer of high power‐density plasma, as shown in Figure c.…”