title: Potassium polytitanate gas-sensor study by impedance spectroscopy.
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)-10(6) 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.
authors.affiliation: Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia; V. A. Kotel'nikov Institute of RadioEng. & Electr. of RAS, Saratov Branch, 38 Zelenaya Street, 410019, Saratov, Russia. Electronic address: fedorov_fs@daad-alumni.de.
authors.forename: F S
authors.initials: FS
authors.lastname: Fedorov
authors.affiliation: Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia.
authors.forename: A S
authors.initials: AS
authors.lastname: Varezhnikov
authors.affiliation: Breitmeier Messtechnik GmbH, Ettlingen, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Kiselev
authors.affiliation: Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Kolesnichenko
authors.affiliation: Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia; National University of Science and Technology (MISiS), 4 Leninskiy prospekt, 119049, Moscow, Russia.
authors.forename: I N
authors.initials: IN
authors.lastname: Burmistrov
authors.affiliation: Institute for Microstructure Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Sommer
authors.affiliation: Institute for Solid-State Physics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Fuchs
authors.affiliation: Institute of Nanotechnology and Karslruhe Nano Micro Facility, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Kübel
authors.affiliation: Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Gorokhovsky
authors.affiliation: Yuri Gagarin State Technical University of Saratov, 77 Politechnicheskaya Street, 410054, Saratov, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Sysoev
keywords: Gas sensor; Impedance spectroscopy; Multielectrode sensor array; Pattern recognition; Potassium polytitanate