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Mass Spectrometric Observations of the Ionic Species in a Double Dielectric Barrier Discharge Operating in Nitrogen
Author(s) -
AbdAllah Zaenab,
Sawtell David A. G.,
West Glen T.,
Kelly Peter J.,
Bradley James W.
Publication year - 2016
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.201500149
Subject(s) - dielectric barrier discharge , analytical chemistry (journal) , ion , chemistry , nitrogen , electrode , plasma , atmospheric pressure , ionic bonding , residence time (fluid dynamics) , carbon fibers , materials science , environmental chemistry , physics , geotechnical engineering , oceanography , organic chemistry , quantum mechanics , composite number , engineering , composite material , geology
Negative and positive ions generated in an atmospheric‐pressure DBD with double dielectrics were identified and their relative intensities characterized with variation of water vapor concentration in the discharge, gas residence time, and inter‐electrode spacing. The most abundant negative ions were O − , OH − , CN − , CNO − ,N O 2 − ,N O 2 − ( H 2 O ) , andN O 3 −while the positive ions were dominated by N + , CH 2+ ,N 2 + , CO + , HCO + , N 2 H + , O 2 + , H + (H 2 O) n , CNO + , and CN 2 O + . Increasing the water concentration in the discharge led to an increase in the intensity of H + (H 2 O) n ,N O 2 −and its hydrated clusters, while the intensity of all carbon containing species decreased. Increasing the residence time of the species in the plasma region decreased the concentration of O − , OH − , andN O 2 − , while the concentration ofN O 3 −increased. Changing the inter‐electrodes spacing did not have any effect on the formation of ionic species in the discharge.