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. 2019 Mar 14;19(6):1296. doi: 10.3390/s19061296

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© 2019 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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(a) Repeated tests for P3HT nanofibers sensors against 3.5 ppm of acetone in nitrogen as carrier gas at 25 °C. (b) Normalised current data collected from a P3HT nanofibers-based sensor exposed to 3.5 ppm of acetone in nitrogen as gas carrier at 25 °C. In panel (a) the black arrows mark the end of the analyte injection procedure (approximately 3 s prior to observe the sensor response onset). In panel (b) the injection occurred at around second 30 (not shown, to evidence the perfect baseline recovery occurring in a few seconds after the signal peak).