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Impedance spectroscopy of sensitive to harmful gases tellurium thin films

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dc.contributor.author TSIULYANU, D.
dc.contributor.author MOCREAC, O.
dc.date.accessioned 2023-11-20T08:54:58Z
dc.date.available 2023-11-20T08:54:58Z
dc.date.issued 2011
dc.identifier.citation TSIULYANU, D., MOCREAC, O. Impedance spectroscopy of sensitive to harmful gases tellurium thin films. In: Journal of Non-Oxide Glasses. 2011, vol. 3. nr. 2, pp. 37-44. ISSN 2065-6874. en_US
dc.identifier.issn 2065-6874
dc.identifier.uri https://chalcogen.ro/index.php/journals/journal-of-non-oxide-glasses/14-jnog/333-volume-3-number-2-april-june-2011
dc.identifier.uri http://repository.utm.md/handle/5014/24921
dc.description.abstract Impedance spectra of tellurium thin films with interdigital platinum electrodes have been investigated in different gaseous media. For the first time it is pointed out that tellurium films exhibit sensitivity to H2 at room temperature along with sensitivity to NO2 and H2S. Analyses in Cole – Cole interpretation allowed evaluating the characteristic frequency, time constant, resistance and capacity of the film in different target gases. It is shown that impedance spectra being strongly influenced by gaseous environment do not change their general shape. The effect of target gas is mainly due to variation of resistance of the film but capacitance does not vary essentially. The sensitivity for impedance or its imaginary part depends on frequency, being the highest to NO2 (~50 % / ppm) but 8 % / ppm and 10-2 % / ppm to H2S and H2 respectively. It is suggested that effect of H2 is due to removal the amount of adsorbed oxygen on the Te surface, whereas effect of NO2 and H2S results respectively from "strong" and "weak" chemisorptions of these molecules on the surface and intra grain regions. en_US
dc.language.iso en en_US
dc.publisher Forum of Chalcogeniders en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject impedance spectra en_US
dc.subject tellurium thin films en_US
dc.subject thin films en_US
dc.subject harmful gases en_US
dc.title Impedance spectroscopy of sensitive to harmful gases tellurium thin films en_US
dc.type Article en_US


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