期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 864, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.158891
关键词
Up-conversion, nanothermometry, Er(III); Ln(3+) doped luminescent nanoparticles; Temperature sensing; Lanthanide ions luminescence
资金
- Polish National Science Centre [UMO-2016/21/B/ST5/00110, UMO-2018/31/N/ST4/00684]
- European Union through the European Social Fund under the Operational Program Knowledge Education Development [POWR.03.02.00-00-i020/17]
This study synthesized a series of Y2-xMoO6:xEr(3+) upconverting nanoparticles using a sol-gel method, showing high thermal sensitivity. Comparing the thermometric properties determined by thermally coupled and non-thermally coupled levels, the optimal conditions for achieving superior thermal sensitivity were identified, with Er3+ content found to significantly impact the thermal sensitivity.
Contactless optical nanothermometers of high thermal sensitivity are in great demand in various fields. In this work, we applied a facile sol-gel method to synthesize a series of Y2-xMoO6:xEr(3+) upconverting nanoparticles (UCNPs), capable of acting as luminescence nanothermometers. Upon 980 nm laser light irradiation, with increasing Er3+ content, the prepared samples show a color-tunable upconversion emission, from green to yellow. Comparison of the thermometric properties determined by the Stark thermally coupled levels (TCLs) with those determined by the Stark non-thermally coupled levels (non-TCLs) showed that the superior thermal sensitivity (maximal S-r = 2.063%K-1 at 303 K) is achieved for the non-TCLs F-4(9/2)(1())/S-4(3/2)(1()). Moreover, a higher content of Er3+ in UCNPs (Y1.88MoO6:0.12Er(3+) UCNPs) has been found to lead to a significant increase of S-r (S-r MAX = 2.460%K-1 at 303 K). Y2-xMoO6:xEr(3+) UCNPs are promising materials for contactless nanothermometers of high sensitivity. (C) 2021 Elsevier B.V. All rights reserved.
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