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10 March 2020 Oxides-based nanophosphors for thermometry at nanoscale (Conference Presentation)
Estelle Glais, Lise Abiven, Corinne Chaneac, Bruno Viana
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Proceedings Volume 11281, Oxide-based Materials and Devices XI; 112810Y (2020) https://doi.org/10.1117/12.2548130
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
The variation of luminescent properties with temperature is one promising way in order to measure temperature. Luminescent nanomaterials allow a local and contactless temperature determination. Among the oxides based nanophosphors, ZnGa2O4:Cr3+ is a potential nanothermometer because of its high sensitivity on a large temperature range. Indeed, the luminescence lifetime of the 2E emitted state is drastically dependent on temperature since the 4T2 and 2E levels are in thermal equilibrium. In this study we optimized the luminescence properties of 10 nm in diameter nanoparticles in order to improve their capability as thermal nanosensor. Persistent luminescence decays and photoluminescence properties are investigated at several temperatures. The obtained sensitivity are about 2%C-1 for these optical measurements making this materials a good temperature sensor. Furthermore in order to generate a local temperature increase, gold nanorods are synthetized and tested with the NPs.
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Estelle Glais, Lise Abiven, Corinne Chaneac, and Bruno Viana "Oxides-based nanophosphors for thermometry at nanoscale (Conference Presentation)", Proc. SPIE 11281, Oxide-based Materials and Devices XI, 112810Y (10 March 2020); https://doi.org/10.1117/12.2548130
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KEYWORDS
Oxides
Luminescence
Thermometry
Nanosensors
Temperature metrology
Gold
Nanomaterials
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