Back to Search Start Over

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.

Authors :
Wei, Hongling
Cui, Fuyi
Guo, Weigang
Ye, Renguang
Lei, Lei
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]

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