Journal
MATERIALS RESEARCH BULLETIN
Volume 134, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2020.111086
Keywords
NaYF4; Core-shell nanoparticles; Photothermal conversion; Fluorescence intensity ratio; Temperature sensing
Categories
Funding
- NSFC (National Natural Science Foundation of China) [11774042, 11704056, 51772159]
- Fundamental Research Funds for the Central Universities [3132016333]
- China Postdoctoral Science Foundation [2016M591420]
- Open Fund of the State Key Laboratory of Integrated Optoelectronics [IOSKL2018KF02]
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This study synthesized core-shell nanoparticles with both photothermal conversion and temperature detection capabilities, finding that different coatings did not significantly affect their performance. The photothermal conversion capacity increased with higher Yb3+ concentration and 980 nm laser excitation power.
In recent years, multi-functional nano-structures potentially used as photothermal conversion agents, biomedical imaging platforms, drug delivery carriers and temperature probes have been widely investigated. In this paper, NaYF4:Er3+/Yb3+@NaYF4:Sm3+/Yb3+ core-shell nanoparticles (NPs) which combined the functions of both the photothermal conversion and temperature detection were synthesized. Temperature sensing properties of the core-shell particles were investigated, and it was found that NaYF4:Er3+/Yb3+ self-coating or NaYF4:Sm3+/Yb3+ coating did not cause substantial change in the temperature sensing properties of Er3+. Furthermore, the photothermal conversion was investigated, and it was found that the photothermal conversion can be achieved by the designed core-shell particles. Moreover, the photo-to-heat conversion capacity increases with increasing Yb3+ concentration and 980 nm laser excitation power, which was also verified by the laser-induced ethanol evaporation experiments.
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