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. 2021 Jun 26;14(13):3578. doi: 10.3390/ma14133578

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© 2021 by the authors.

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/).

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AFM topographic images of the initial samples’ surfaces: (a) Blugloo, (b) Light Bond, (c) Opal Seal, and (d) Experimental material C1. Three-dimensional images of each topographic image are given below.