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. 2017 Aug 29;7:9732. doi: 10.1038/s41598-017-10495-8

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© The Author(s) 2017

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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The electrical characterization of TiO_x NT array based multisensor chip: (a) I–V curves recorded from three exemplary segments under constant flow (100 sccm) of laboratory air at 350 °C; (b) the dependence of chip segments response to 10 ppm of ethanol, isopropanol, and acetone on operating temperature; (c) the dependence of chip segments response on vapor (ethanol, isopropanol, and acetone) concentration in air at 350 °C; (d) the variations of the chip segments resistances, R(t), to pulses of isopropanol at different ppm concentrations under operating temperature of 350 °C; thick black line denotes the segments median resistance.