A suitable (wide-range + linear) temperature sensor based on Tm3+ ions
Autor: | D. Scoca, Antonio Ricardo Zanatta, Fernando Alvarez |
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Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
Materials science
FILMES FINOS chemistry.chemical_element lcsh:Medicine 02 engineering and technology 01 natural sciences Molecular physics Article Ion 0103 physical sciences lcsh:Science 010302 applied physics Range (particle radiation) Multidisciplinary Dynamic range business.industry Resolution (electron density) lcsh:R 021001 nanoscience & nanotechnology Characterization (materials science) Thulium chemistry Light emission lcsh:Q Photonics 0210 nano-technology business |
Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017) Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
ISSN: | 2045-2322 |
Popis: | Future advances in the broad fields of photonics, (nano-)electronics or even theranostics rely, in part, on the precise determination and control, with high sensitivity and speed, of the temperature of very well-defined spatial regions. Ideally, these temperature-sensors (T-sensors) should produce minimum (or no) disturbance in the probed regions, as well as to exhibit good resolution and significant dynamic range. Most of these features are consistent with the sharp and distinctive optical transitions of trivalent rare-earth (RE3+) ions that, additionally, are susceptible to their local environment and conditions. Altogether, these aspects form the basis of the present work, in which we propose a new T-sensor involving the light emission of trivalent thulium ions (Tm3+) embedded into crystalline TiO2. The optical characterization of the TiO2:Tm3+ system indicated a Tm3+-related emission at ~676 nm whose main spectral features are: (1) a temperature-induced wavelength shift of −2.2 pm K−1, (2) a rather small line-width increase over the ~85–750 K range, and (3) minimum data deconvolution-processing. The study also included the experimental data of the well-established pressure- and T-sensor ruby (Al2O3:Cr3+) and a comprehensive discussion concerning the identification and the excitation-recombination mechanisms of the Tm3+-related transitions. |
Databáze: | OpenAIRE |
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