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Pressure dependent luminescence in titanium dioxide particles modified with europium ions
Mechanical Engineering Department & TEMA, University of Aveiro, Campus Universitário de Santiago.
Physics Department & I3N, University of Aveiro, Campus Universitário de Santiago.
Mechanical Engineering Department & TEMA, University of Aveiro, Campus Universitário de Santiago.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-8676-8819
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2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 234, p. 137-144Article in journal (Refereed) Published
Abstract [en]

Particles of titanium dioxide were prepared in the presence of europium ions (TiO2:Eu) by a solvothermal method and thermal annealed in air at 500 °C. The spectroscopic properties of TiO2:Eu particles were analyzed indicating that the Eu3+ ions are likely distributed at the surface or near the surface of the titanium dioxide particles. The photoluminescence analysis showed that the intraionic emission was strongly sensitive to reduced pressure conditions, as seen by its absence under vacuum conditions. The ion emission was re-established as soon as the atmosphere was restored. Additionally, the ion integrated emission intensity follows a linearly dependence with pressure in the range of 150 to 800 mbar revealing a high sensitivity to small variations in pressure, which is an unprecedented result. This innovation will allow the study of new technologies in the area of low vacuum sensors where TiO2:Eu may act as the active element of an optical sensor for a pressure device.

Place, publisher, year, edition, pages
2016. Vol. 234, p. 137-144
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-9304DOI: 10.1016/j.snb.2016.04.157ISI: 000378538700019Scopus ID: 2-s2.0-84966700386Local ID: 7e561673-3600-4ecc-ac0c-421081206534OAI: oai:DiVA.org:ltu-9304DiVA, id: diva2:982242
Note
Validerad; 2016; Nivå 2; 20160502 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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