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. 2020 Jun 25;13(12):2859. doi: 10.3390/ma13122859

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© 2020 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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Characterization of the oscillator-based relative humidity sensor with PEDOT:PSS. (a) Schematic of the sensor. (b) Variation in oscillating frequency with change in relative humidity [94].