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Potassium polytitanate gas-sensor study by impedance spectroscopy |
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| Authors: | FS Fedorov AS Varezhnikov I Kiselev VV Kolesnichenko IN Burmistrov M Sommer D Fuchs C Kübel AV Gorokhovsky VV Sysoev |
| Institution: | 1. Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia;2. V. A. Kotel''nikov Institute of RadioEng. & Electr. of RAS, Saratov Branch, 38 Zelenaya Street, 410019, Saratov, Russia;3. Breitmeier Messtechnik GmbH, Ettlingen, Germany;4. National University of Science and Technology (MISiS), 4 Leninskiy prospekt, 119049, Moscow, Russia;5. Institute for Microstructure Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany;6. Institute for Solid-State Physics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany;g Institute of Nanotechnology and Karslruhe Nano Micro Facility, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany |
| Abstract: | Nanocrystalline potassium polytitanates K2O·nTiO2·mH2O represent a new type of semiconducting compounds which are characterized by a high specific surface that makes them promising for use in gas sensors. In this work, we have studied potassium polytitanate mesoporous nanoparticle agglomerates placed over a SiO2/Si substrate equipped with multiple coplanar electrodes to measure the electrical response to various organic vapors, 1000 ppm of concentration, mixed with air by impedance spectrometry in range of the 10−2–106 Hz. The recorded impedance data for each sensor segment are associated with RC components of an equivalent circuit which are applied to selectively recognize the test vapors exploiting a “multisensor array” approach. |
| Keywords: | Gas sensor Multielectrode sensor array Potassium polytitanate Impedance spectroscopy Pattern recognition |
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