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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/).
Magnified CLSM image via z-stack acquisition: Here, labeled keto-HPC accumulates on the fiber surface and also penetrates through the fiber wall (A); in addition, polymer accumulations of keto-HPC are located within fiber–fiber intersections and welding fibers together (B).