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Nd3+-sensitized NIR downshifting emission in NaYbF4: Nd@NaYF4: Nd nanoparticles for deep tissue temperature sensing.
Nd3+-sensitized NIR downshifting emission in NaYbF4: Nd@NaYF4: Nd nanoparticles for deep tissue temperature sensing.
- Source :
-
Optical Materials . Feb2022, Vol. 124, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- Temperature sensing technology is of great siginificance in scientific research, agricultral production and industrial manufacture. In this work, the sub-10 nm NaYbF 4 : Nd@NaYF 4 : Nd active-core/active-shell NPs are employed for near-infrared (NIR) temperature sensing. Compared with the core-only and core/inert-shell NPs, the downshifting emission intensity of the NaYbF 4 : Nd@NaYF 4 : Nd active-core/active-shell NPs is greatly enhanced. Upon 808 nm excitation, the Yb3+ emission intensity at ∼975 nm decreases evidently while that of Nd3+ ions at ∼1055 nm only slightly decreases with the rising of temperature from 293 K to 493 K. The maximum S a of 1.27*10−3 K−1 at 470 K and S r of 0.7%/K at 293 K are achieved. The NIR emission studied in this work show deep penetration depth more than 4 mm. • Sub-10 nm NaYbF 4 : Nd@NaYF 4 : Nd active-core/active-shell NPs are prepared. • The active NaYF 4 : Nd shell greatly enhances the Yb3+ NIR intensity. • The Yb3+ emisison decreases evidently while that of Nd3+ slightly decreases at higher temperature. • The maximum S a of 1.27*10−3 K−1 at 470 K and S r of 0.7% K−1 at 293 K are achieved. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TEMPERATURE
*HIGH temperatures
*NANOPARTICLES
*TISSUES
Subjects
Details
- Language :
- English
- ISSN :
- 09253467
- Volume :
- 124
- Database :
- Academic Search Index
- Journal :
- Optical Materials
- Publication Type :
- Academic Journal
- Accession number :
- 155489705
- Full Text :
- https://doi.org/10.1016/j.optmat.2022.112016