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Effects of Ta/Nb-doping on titania-based thin films for gas-sensing
INFM-CNR Sensor Lab.
INFM-CNR Sensor Lab.
INFM-CNR Sensor Lab.
INFN - Legnaro National Laboratories.ORCID iD: 0000-0003-2935-1165
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2005 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 108, no 1-2 SPEC. ISS., p. 21-28Article in journal (Refereed) Published
Abstract [en]

Thin films of titania with the addition of niobium and tantalum have been achieved by reactive sputtering process. Structural and morphological studies have been carried out by means of XRD, RBS, TEM and AFM in order to correlate the microstructural features to the sensing performance of the layers. The films proved sensitive to ethanol and carbon monoxide and ammonia. In the case of niobium addition, it was shown that annealing temperature and niobium content strongly influence the gas response of the films converting a n-type response, which is typical of pure TiO2 and of most of metal-oxide sensors, to a p-type response; this peculiarity is crucial for the discrimination of different gases. In the case of tantalum addition, the annealing treatment at 800 °C led only to a phase transformation that reduced the sensing performance of the layer. High sensitivity to CO is achieved with anatase or mixed anatase and rutile phases, while the rutile phase only exhibit a low gas sensitivity. © 2005 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2005. Vol. 108, no 1-2 SPEC. ISS., p. 21-28
Keywords [en]
Carbon monoxide, Ethanol, Niobium, Tantalum, TiO
National Category
Other Physics Topics
Research subject
Experimental Physics
Identifiers
URN: urn:nbn:se:ltu:diva-8778DOI: 10.1016/j.snb.2004.10.041ISI: 000230330300004Scopus ID: 2-s2.0-19744370766Local ID: 750544af-c8d4-4652-bece-c7c4278a5f0dOAI: oai:DiVA.org:ltu-8778DiVA, id: diva2:981716
Note

Upprättat; 2005; 20141216 (albvom)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-10-04Bibliographically approved

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