jet at atmospheric pressure. The parameters were the treatment time and the gas
composition (argon or argon with admixtures). Moreover, the influence of power modulation
was studied. It was found that significant change in wettability is achieved very rapidly, after
only 25 ms of treatment. Plasma-induced surface changes are discussed using AFM, ATR-
FTIR and XPS results. It is concluded that the increase in wettability is caused by both …