Transport and accumulation of plasma generated species in aqueous solution

• Published in: Physical chemistry chemical physics : PCCP Vol. 20; no. 10; pp. 6845 - 6859
• Main Authors: Verlackt, C C W, Van Boxem, W, Bogaerts, A
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 2018
• Subjects: Biomedical materials; Chemical reactions; Cold pressing; Computational fluid dynamics; Hydrogen peroxide; Liquids; Nitrogen dioxide; Plasma; Solvation; Sterilization; Two dimensional models; Water
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/c7cp07593f

The interaction between cold atmospheric pressure plasma and liquids is receiving increasing attention for various applications. In particular, the use of plasma-treated liquids (PTL) for biomedical applications is of growing importance, in particular for sterilization and cancer treatment. However, insight into the underlying mechanisms of plasma-liquid interactions is still scarce. Here, we present a 2D fluid dynamics model for the interaction between a plasma jet and liquid water. Our results indicate that the formed reactive species originate from either the gas phase (with further solvation) or are formed at the liquid interface. A clear increase in the aqueous density of H O , HNO /NO and NO is observed as a function of time, while the densities of O , HO /O and ONOOH/ONOO are found to quickly reach a maximum due to chemical reactions in solution. The trends observed in our model correlate well with experimental observations from the literature.