Impedance characterization of Te based gas sensitive films
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2019-06-11 11:50
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TSIULYANU , Dumitru, MOCREAC, Olga. Impedance characterization of Te based gas sensitive films. In: Telecommunications, Electronics and Informatics, Ed. 6, 24-27 mai 2018, Chișinău. Chișinău, Republica Moldova: 2018, Ed. 6, pp. 166-169. ISBN 978-9975-45-540-4.
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Telecommunications, Electronics and Informatics
Ed. 6, 2018
Conferința "Telecommunications, Electronics and Informatics"
6, Chișinău, Moldova, 24-27 mai 2018

Impedance characterization of Te based gas sensitive films


Pag. 166-169

Tsiulyanu Dumitru, Mocreac Olga
 
Technical University of Moldova
 
Disponibil în IBN: 30 mai 2018


Rezumat

Gas sensing performance of Te films investigated by method of impedance spectroscopy is reported and discussed. The films have been prepared by thermal vacuum evaporation onto sintered alumina (Al2O3) substrates with a priory deposited platinum interdigital electrodes. The morphology of the films appears to consist of interconnected islands and dots, which facilitate the solid-gas interaction. It is shown that impedance spectra are strongly influenced by gaseous environment. Analyses of complex impedance spectra allowed evaluating of some physical parameters of the films, in both dry air and its mixture with hydrogen, nitrogen dioxide and hydrogen sulfide taken as target gases. The interfering sensitivities to these gases at room temperature have been assessed.

Cuvinte-cheie
Impedance, Gas sensitivity, NO2,

Te films, H2 S,

H2