The interaction of atmospheric pressure plasmas with a liquid can result in the deformation of the gas–liquid interface. In this paper, we report on the gas–liquid interfacial dynamics during the impingement of an argon radio frequency driven atmospheric pressure plasma jet (APPJ). The dynamics of the dimples generated during the impingement of the APPJ on the liquid depends on the plasma power, gas flow rate, size of the liquid container and the distance of the APPJ nozzle to the liquid surface. When the plasma is in contact with the liquid, the dimple oscillation frequency correlates with the dynamics of the plasma filament. At larger jet-liquid distances, the APPJ behaves similar to a gas jet although in most cases with an enhanced deformation of the liquid interface or change in dimple dynamics. The observed dimple oscillations can significantly enhance the decomposition efficiency of crystal violet by enhancing liquid phase convection. The conditions studied in this paper are similar to typical conditions for in vitro plasma-bio-interaction studies and the plasma-induced interfacial liquid dynamics, which is often not considered in many studies, might enhance plasma-induced liquid phase chemistry and reactivity.

大气压等离子体与液体的相互作用会导致气液界面变形。在本文中，我们报告了在氩气射频驱动的大气压等离子体射流（APPJ）撞击过程中的气液界面动力学。在APPJ撞击液体期间产生的凹痕的动力学取决于等离子功率，气体流速，液体容器的大小以及APPJ喷嘴到液体表面的距离。当等离子体与液体接触时，凹坑振荡频率与等离子体灯丝的动力学相关。在较大的喷射液距离下，APPJ的行为类似于气体喷射，尽管在大多数情况下，液体界面的变形增强或酒窝动力学变化。通过增强液相对流，观察到的凹痕振荡可以显着提高结晶紫的分解效率。本文研究的条件与典型条件相似体外血浆生物相互作用研究和血浆诱导的界面液体动力学（许多研究通常没有考虑）可能会增强血浆诱导的液相化学和反应性。