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Spatial‐temporal distributions of ROS in model tissues treated by a He+O 2 plasma jet
Author(s) -
Liu Dingxin,
He Tongtong,
Liu Zhijie,
Wang Sui,
Liu Zhichao,
Rong Mingzhe,
Kong Michael G.
Publication year - 2018
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201800057
Subject(s) - plasma , irradiation , penetration (warfare) , reactive oxygen species , penetration depth , materials science , biophysics , chemistry , plasma medicine , analytical chemistry (journal) , atmospheric pressure plasma , optics , biology , physics , chromatography , biochemistry , mathematics , operations research , quantum mechanics , nuclear physics
The transportation of reactive oxygen species (ROS) to lesion site through human tissue is crucial for plasma medicine. For this reason, the spatial‐temporal distributions of ROS in model tissues irradiated by a He + O 2 plasma jet were investigated in this paper. It was found that the ROS formed a ring‐shaped surface pattern on the model tissue, of which the diameter increased with the gas flow rate but remained unchanged with the plasma treatment time. The surface pattern changed significantly with the inclination angle of plasma irradiation, suggesting that the ROS dosage is difficult to precisely control for clinical applications. Moreover, the penetration depth of O 3 increased linearly with the plasma treatment time or the water content of the model tissue.