Kirsty McKay

Dynamics and particle fluxes in atmospheric-pressure electronegative radio frequency microplasmas

We report on intricate dynamics observed in atmospheric-pressure rf electronegative discharges where electrons and anions are separated due to their different mobilities. This results in the formation of positively charged regions between an electronegative plasma core and an oscillating electron ensemble. It is found that for a given input power, the electron, ion (both positive and negative) and neutral fluxes increase as the gap size is reduced, resulting in a more efficient delivery of chemical species to a treated target.

Double-Layer Structures in Low-Temperature Atmospheric-Pressure Electronegative RF Microplasmas: Separation of Electrons and Anions

Stratification of negatively charged species in electronegative discharges is a well-known phenomenon that can lead to various double-layer structures. Here, we report on the separation of electrons and anions in atmospheric-pressure electronegative microdischarges. In these discharges, electrons oscillate between the electrodes, moving across and beyond an electronegative core. As a result of this motion, positively charged regions form between the oscillating electron ensemble and the central electronegative discharge.

Generation and loss of reactive oxygen species in low-temperature atmospheric-pressure RF HE+O 2 +H 2 O plasma

Summary form only given. This study focuses on the generation and loss of reactive oxygen species (ROS) in low-temperature atmospheric-pressure rf (13.56MHz) He+O 2 +H 2 O plasmas, which are of interest for many biomedical applications.