Cover Picture: Plasma Process. Polym. 9∕2016

Abstract

Front Cover: The time‐dependent contact angle drop during plasma afterglow activation of polymers can be described by exponential decay processes. Fitted parameters enable the comparison of different discharge configurations and therefore allow adjusting treatment conditions to process requirements. Further on, they facilitate to study the influence of experimental settings on activation process. Further details can be found in the article by G. Oberbossel et al. http://doi.wiley.com/10.1002/ppap.201600022.

Effect of airflow on the discharge uniformity at different cycles in the repetitive unipolar nanosecond‐pulsed dielectric barrier discharge

“…As a reliable method to directly generate nonequilibrium plasma at atmospheric air, dielectric barrier discharges (DBDs) have the advantage of flexible structure, good cost performance, low gas temperature, as well as sufficient concentration of active species. [1,2] Therefore, they have wide application prospects in many fields, such as thin-film deposition, [3][4][5] ozone generation, [6,7] biomedical treatment, [8][9][10][11] material processing, [12][13][14] flow control, [15,16] and so on. A DBD has three typical discharge modes, namely filamentary mode, patterned mode, and diffuse mode.…”