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Nanomaterials 2017, 7(12), 455;

The Room-Temperature Chemiresistive Properties of Potassium Titanate Whiskers versus Organic Vapors

Laboratory of Sensors and Microsystems, Yuri Gagarin State Technical University of Saratov, 77 Polytechnicheskaya str., Saratov 410054, Russia
Laboratory of Nanomaterials, Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, 3 Nobel str., Moscow 143026, Russia
Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology MISiS, 4 Leninskiy pr., Moscow 119991, Russia
Institute of Microstructure Technology, Karlsruhe Institute of Technology, 1 Hermann-von-Helmholtz Platz, 76344 Eggenstein-Leopoldshafen, Germany
Department of Applied Physics, Aalto University, Puumiehenkuja 2, 00076 Aalto, Finland
Authors to whom correspondence should be addressed.
Received: 13 November 2017 / Revised: 2 December 2017 / Accepted: 11 December 2017 / Published: 19 December 2017
(This article belongs to the Special Issue Oxide Nanomaterials for Chemical Sensors)
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The development of portable gas-sensing units implies a special care of their power efficiency, which is often approached by operation at room temperature. This issue primarily appeals to a choice of suitable materials whose functional properties are sensitive toward gas vapors at these conditions. While the gas sensitivity is nowadays advanced by employing the materials at nano-dimensional domain, the room temperature operation might be targeted via the application of layered solid-state electrolytes, like titanates. Here, we report gas-sensitive properties of potassium titanate whiskers, which are placed over a multielectrode chip by drop casting from suspension to yield a matrix mono-layer of varied density. The material synthesis conditions are straightforward both to get stable single-crystalline quasi-one-dimensional whiskers with a great extent of potassium replacement and to favor the increase of specific surface area of the structures. The whisker layer is found to be sensitive towards volatile organic compounds (ethanol, isopropanol, acetone) in the mixture with air at room temperature. The vapor identification is obtained via processing the vector signal generated by sensor array of the multielectrode chip with the help of pattern recognition algorithms. View Full-Text
Keywords: potassium titanate; whisker; gas sensor; multisensor array; gas analysis; organic vapors potassium titanate; whisker; gas sensor; multisensor array; gas analysis; organic vapors

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Varezhnikov, A.S.; Fedorov, F.S.; Burmistrov, I.N.; Plugin, I.A.; Sommer, M.; Lashkov, A.V.; Gorokhovsky, A.V.; Nasibulin, A.G.; Kuznetsov, D.V.; Gorshenkov, M.V.; Sysoev, V.V. The Room-Temperature Chemiresistive Properties of Potassium Titanate Whiskers versus Organic Vapors. Nanomaterials 2017, 7, 455.

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