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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 (http://creativecommons.org/licenses/by/4.0/).
XPS O1s spectra of (a) CFA-calcined and (b) MWA-calcined IGZO NFs. Dashed and solid areas indicate data for IGZO NFs obtained before and after postcalcination oxygen plasma treatment, respectively.