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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/).
XPS analysis of (i) GO and (ii) GOn. Deconvolution of high-resolution (A) C1s and (B) O1s spectra enabled the quantification of functional groups on graphene backbone.