Vol. 17, No. 1 (2023) e01003 (9pp)

https://doi.org/10.34343/ijpest.2023.17.e01003

Effect of supplied gas on ROS transport through liquid targets by plasma jet irradiation

Heping Shi, Kecheng Shen, Toshiyuki Kawasaki*

* The author to whom correspondence should be addressed.

Department of Electrical Engineering, Nishinippon Institute of Technology, Japan

Abstract

Recently, plasma jet technology has been developed for biomedical applications, so we must control the supply of reactive oxygen species (ROSs) by plasma to use it safely and effectively. In previous studies, several experiments were conducted using a He plasma jet. However, we have not investigated whether there is any difference when supplying different types of gas. In this study, we studied the effects of supplied gases (He and Ar) on ROS distribution in liquid and tissue models induced by plasma jet irradiation. In this experiment, we visualized the ROS distribution pattern after passing through a water layer or tissue model and obtained the relative ROS concentration profiles using absorbance measurement. The results show that the transport characteristics of ROSs produced by He or Ar plasma jets have nothing in common. We also analyzed the components of water after plasma jet irradiation.

Keywords - ROS transport, water analysis, 2-dimentsional distribution.

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