Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 125, Issue 48, Pages 13132-13136Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.1c07659
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Funding
- Concordia University
- Natural Science and Engineering Research Council (NSERC) of Canada
- NSERC
- Office of Vice President for Research and Economic Development
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In this study, the decay time of the H-3(4) state in Yb3+, Tm3+-doped nanoparticles was introduced for improved nanothermometry in biological applications. The strong 800 nm upconversion emission in the first biological transparency window was utilized for lifetime nanothermometry, marking the first use of a single upconversion band for this purpose.
Emission bands from thermally coupled states in lanthanide-doped nanoparticles have been studied for ratiometric nanothermometry in biological applications. Unfortunately certain factors such as water absorption distort the intensity, limiting the accuracy of ratiometric nanothermometry. However, the decay time of such states does not suffer from such distortions. We introduce the decay time of the H-3(4) state in Yb3+, Tm3+-doped nanoparticles for improved nanothermometry. The strong 800 nm upconversion emission exists in the first biological transparency window. This is the first use of a single upconversion band for lifetime nanothermometry.
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