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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Radical (left) and ion (right) densities obtained from (a,b) Ar-mixture plasma, (c,d) Kr-mixture plasma, and (e,f) Xe-mixture plasma, at various noble gas flow rates. The flow rates of the FC precursors and O2 are 6 sccm and 3 sccm, respectively.