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. 2023 Oct 6;23(19):8261. doi: 10.3390/s23198261

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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(a) The room temperature experimental (scattered) and fitted (lines) impedance spectra for the TTO:Mo sample under different RH levels. (b) Schematic representation of the humidity-sensing mechanism for the porous TTO ceramic samples.