Breaking-through methods for experimental observation on short-lived reactive species in the liquid phase, generated at the interface of atmospheric-pressure plasmas (APPs), can contribute greatly to an understanding of the reaction processes. A newly developed high-speed liquid flow interface in helium plasma transports APP-generated liquid-phase OH radical (OH) by advection, enabling observation of rapid APP-generated OH decay within approximately 0.5ms for the first time, to our best knowledge. This experimental detection and the deduced quantification of the rapid OH decay suggests a surface localization of OH, and thus can be an important finding to characterize the inhomogeneous OH distribution.

在大气压等离子体 (APP) 界面处产生的液相中短寿命反应物种的实验观察突破性方法可以极大地有助于理解反应过程。据我们所知，氦等离子体中新开发的高速液流界面通过平流传输 APP 生成的液相 OH 自由基 (OH)，首次能够在大约 0.5 毫秒内观察到 APP 生成的 OH 快速衰减。这种实验检测和对 OH 快速衰变的推断量化表明 OH 的表面定位，因此可能是表征不均匀 OH 分布的重要发现。