dc.contributor.author | TSIULYANU, Dumitru | |
dc.contributor.author | MOCREAC, O. | |
dc.contributor.author | BRANISTE, T. | |
dc.date.accessioned | 2022-02-04T13:12:22Z | |
dc.date.available | 2022-02-04T13:12:22Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | TSIULYANU, Dumitru, MOCREAC, O., BRANISTE, T. Involvement of Contact and Surface Phenomena in Nanolayered Amorphous Te Films for Toxic Gas Detection at Room Temperature. In: 5th International Conference on Nanotechnologies and Biomedical Engineering, ICNBME: proc. IFMBE, 3-5 Nov. 2021, Chișinău, Moldova, 2022, V. 87, pp. 560-567. ISBN 978-3-030-92328-0. | en_US |
dc.identifier.isbn | 978-3-030-92328-0 | |
dc.identifier.uri | https://doi.org/10.1007/978-3-030-92328-0_72 | |
dc.identifier.uri | http://repository.utm.md/handle/5014/19196 | |
dc.description | Acces full text - https://doi.org/10.1007/978-3-030-92328-0_72 | en_US |
dc.description.abstract | A fast responding NO2 sensitive device operating at room temperature has been realized using the nanolayered amorphous Te (a-Te) grown onto insulating wafer of silicon dioxide (SiO2) between Pt contact electrodes with larger thickness in a planar arrangement. The structure of the fabricated sensor has been investigated by AFM and SEM but its characterization was realized via studying the current - voltage characteristics, dynamic response, long – term stability and effect of humidity. Explanation of obtained results is given in terms of a model based on simultaneous involvement of contact and surface phenomena for the gas sensing. As the Pt electrode work function (5.43 eV) exceeds the respective value of a-Te (5.03 eV) the ohmic contacts are formed and the current flow is controlled exclusively by bulk resistance of a-Te nanolayer that is known to be controlled by type and concentration of toxic gas of the ambiance. Wherein, as the energetic forbidden gap of a-Te (0.33 eV) is less than the work function difference between contacting materials, at the contacts can arise the degenerate regions of p-type metallic Te, as well as geometric contact gaps originated from microscopically roughness. The gas adsorption inside these contacts gaps leads to increasing the portion of the semiconducting a-Te nanolayer turned into metal of p-type Te and consequently to a fast increasing of the current. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Springer, Cham | 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 | nitrogen dioxide sensitive devices | en_US |
dc.subject | sensors | en_US |
dc.subject | semiconducting nanolayers | en_US |
dc.subject | nanolayers | en_US |
dc.subject | gas sorption | en_US |
dc.title | Involvement of Contact and Surface Phenomena in Nanolayered Amorphous Te Films for Toxic Gas Detection at Room Temperature | en_US |
dc.type | Article | en_US |
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