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Main Species and Physicochemical Processes in Cold Atmospheric‐pressure He + O 2 Plasmas
Author(s) -
Liu DingXin,
Rong MingZhe,
Wang XiaoHua,
Iza Felipe,
Kong Michael G.,
Bruggeman Peter
Publication year - 2010
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.201000049
Subject(s) - oxygen , plasma , atmospheric pressure plasma , atmospheric pressure , ion , atomic physics , dissipation , excitation , electron , chemistry , electron temperature , analytical chemistry (journal) , chemical physics , physics , environmental chemistry , thermodynamics , meteorology , organic chemistry , quantum mechanics
The main species and chemical processes in low‐temperature atmospheric‐pressure He + O 2 plasmas are identified using a comprehensive global model. The simulation results highlight the significance of Penning processes at low oxygen concentration, and the increasingly important role of electron attachment as the oxygen concentration increases. With increasing the oxygen concentration, the electron energy dissipation shifts from elastic collisions with He to dissociative excitation and attachment of O 2 molecules, and large ions ( ${\rm O}_{3}^{ + } $ , ${\rm O}_{4}^{ + } $ ) become the dominant charged species. Generation and loss of ROS (O, O( 1 D), O( 1 S), O 2 (a 1 Δ g ), O 2 (b 1 ∑ g + ), O 3 ) relevant for biomedical applications are discussed.