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. 2018 Aug 2;18(8):2525. doi: 10.3390/s18082525

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© 2018 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 (http://creativecommons.org/licenses/by/4.0/).

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TEM image (A), EDS (B), FTIR spectrum (C) and UV-vis spectrum (D) of MnO₂ nanosheets. Inset of (A,D) showed the HRTEM of MnO₂ nanosheets (A) and dispersion pictures of MnO₂ nanosheets of three parallel operations (D), respectively.