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. 2021 Mar 19;12:1776. doi: 10.1038/s41467-021-21958-y

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© The Author(s) 2021

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. 4 — a The sensitivity of Fe₂O₃, Fe₂O₃/C with the mass of ratio of (3:1), and Fe₂O₃/C@SnO₂ with the mass of ratio of 3:1:4 based sensors. b Response time of Fe₂O₃/C@SnO₂ (3:1:4) pressure sensor. c Detection of low pressure: current curve of the proposed Fe₂O₃/C@SnO₂ (3:1:4) pressure sensor pressed by paper and rice grain. d The current response due to increased pressures under loading and unloading. e Stability performance of the Fe₂O₃/C@SnO₂ (3:1:4) pressure sensor with loading-unloading of more than 3500 cycles.