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. 2020 Nov 5;11:5599. doi: 10.1038/s41467-020-19407-3

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a Optical microscopic and b, c SEM images of the lignin-coated PBMA microbeads after SET-LRP process. d Digital images of PBMA before and after the purification step using basic aqueous solution (NaOH, 0.1 M). e, f SEM images of bare PBMA microbeads obtained after the purification from the lignin-coated analogous.