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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

High-sensitivity dual UV/NIR-excited luminescence thermometry by rare earth vanadate nanoparticles

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Autor(es):
Perrella, Rafael Vieira [1] ; de Sousa Filho, Paulo Cesar [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Inst Chem, Dept Inorgan Chem, R Monteiro Lobato 270, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: DALTON TRANSACTIONS; v. 49, n. 3, p. 911-922, JAN 21 2020.
Citações Web of Science: 0
Resumo

High-crystallinity rare earth (RE) vanadate nanoparticles doped with Tm3+, Er3+ or Ho3+ combine multiple emissions in red, green, and blue under dual UV/NIR excitation, promoting high performance self-referenced luminescence thermometry. Due to their very high chemical and thermal stability, these versatile single-phase compositions allow optical thermal sensing from cryogenic (77 K) to moderately high (673 K) temperatures with high reproducibility and low temperature uncertainty. Hence, these nanomaterials operate as optical thermometers in a very broad temperature range (similar to 600 K), owing to the availability of twelve emission intensity ratios for thermometry. The (Y,Yb,Tm,Er)VO4 powders showed temperature-dependent emission colours from yellow (77 K) to green (333 K) to red (673 K), with one of the highest thermal relative sensitivities reported so far for both upconversion (7.4% K-1) and downshift (2.7% K-1) nanothermometry with inorganic nanoparticles. The stability of the particles also allowed dual luminescence thermometry in aqueous colloids, which showed sensitive and stable thermometric behaviour. In addition, we also discussed the temperature variability against the NIR excitation power in colloids as an additional figure of merit to quantify the reliability of the thermometric response. In summary, our results confirmed that REVO4 with multiple emissions and UV/NIR excitability provide stable, reproducible, and sensitive temperature measurements, giving rise to an optically versatile tool for luminescence nanothermometry. (AU)

Processo FAPESP: 17/11764-2 - Estratégias na síntese de nanomateriais luminescentes para o desenvolvimento de novos sensores ópticos multimodais
Beneficiário:Paulo Cesar de Sousa Filho
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 17/19909-0 - Nanopartículas luminescentes multimodais para termometria e sensoriamento de espécies reativas de oxigênio
Beneficiário:Rafael Vieira Perrella
Linha de fomento: Bolsas no Brasil - Doutorado