Potassium polytitanate gas-sensor study by impedance spectroscopy

F. S. Fedorov, A. S. Varezhnikov, I. Kiselev, V. V. Kolesnichenko, I. N. Burmistrov, M. Sommer, D. Fuchs, C. Kübel, A. V. Gorokhovsky, V. V. Sysoev

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalAnalytica Chimica Acta
Volume897
DOIs
Publication statusPublished - 15 Oct 2015
Externally publishedYes

Keywords

  • Gas sensor
  • Impedance spectroscopy
  • Multielectrode sensor array
  • Pattern recognition
  • Potassium polytitanate

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