Chemical pathways governing the production of Reactive Oxygen Species (ROS) in atmospheric pressure He+O2+H2O plasmas

It is well-known that atmospheric-pressure plasmas can be engineered to produce reactive oxygen species (ROS) and reactive nitrogen species (RNS) known to play important roles in biological systems. Here we concentrate on the generation of ROS, and in particular on the chemical pathways that govern the generation and loss of ROS in atmospheric pressure rf (13.56MHZ) plasmas sustained in helium with admixtures of O2 and H2O.