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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/).
2D and 3D atomic force microscopy (AFM) images of (a) the blank PVC film and the PVC films containing (b) complex 1, (c) complex 2, and (d) complex 3 after irradiation for 300 h.