Potassium polytitanate gas-sensor study by impedance spectroscopy

作者：Fedorov F S^*; Varezhnikov A S; Kiselev I; Kolesnichenko V V; Burmistrov I N; Sommer M; Fuchs D; Kuebel C; Gorokhovsky A V; Sysoev V V

来源：Analytica Chimica Acta, 2015, 897: 81-86.

DOI：10.1016/j.aca.2015.09.029

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

Nanocrystalline potassium polytitanates K2O center dot nTiO(2)center dot mH(2)O 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.

• 出版日期2015-10-15