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. 2021 Jun 12;11(6):1555. doi: 10.3390/nano11061555

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© 2021 by the author.

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/).

PMC Copyright notice

Choice of the second component of SnO₂-based nanocomposite with allowance for the properties of the detected gas. Reprinted with permission from [60]. Copyright 2017 Elsevier. Idea and data from Ref. [51].