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. 2023 Jan 20;23:33. doi: 10.1186/s12903-023-02739-z

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© The Author(s) 2023

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Scanning electron microscopy images and element mapping images of the fabricated MnO₂ nanozyme-doped diatom microbubbler. a Scanning electron microscopy image of diatom microbubbler (magnification: 15,000 times, white scale bar = 5 μm). b Scanning electron microscopy image shows pores on the surface of the diatom microbubbler (magnification: 50,000 times, white scale bar = 2 μm). c Element mapping images showing a homogenous distribution of MnO₂ nanozyme sheets on the diatom microbubbler (black scale bar = 800 nm)