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Noninvasive Temperature Measurement in Dental Materials Using Nd 3+ , Yb 3+ Doped Nanoparticles Emitting in the Near Infrared Region
Author(s) -
Yakovliev Artem,
Ohulchanskyy Tymish Y.,
Ziniuk Roman,
Dias Tereza,
Wang Xin,
Xu Hao,
Chen Guanying,
Qu Junle,
Gomes Anderson S. L.
Publication year - 2020
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201900445
Subject(s) - luminescence , materials science , photoluminescence , nanoparticle , excited state , doping , ion , analytical chemistry (journal) , near infrared spectroscopy , optoelectronics , optics , nanotechnology , chemistry , atomic physics , physics , organic chemistry , chromatography
In this work, the application of near infrared (NIR)‐emitting NaYbF 4 :1%Tm 3+ @NaLuF 4 :30%Nd 3+ core–shell nanoparticles is reported for noninvasive probing and monitoring the temperature during photopolymerization of dental materials. When excited at 808 nm, the synthesized nanoparticles emit NIR photoluminescence (PL) with two distinctive peaks at 865 and 980 nm which correspond to radiative transitions from the doped Nd 3+ and Yb 3+ ions, respectively. Luminescence intensity ratio between these two bands is found to vary with temperature due to temperature‐dependent electronic excitation energy transfer between Nd 3+ and Yb 3+ ions at the core/shell interface. This finding allows luminescence ratiometric evaluation of the in situ temperature during photopolymerization of resin cement (doped with nanoparticles) in a veneer placement procedure. In addition, the NIR emission also enables PL imaging of the distribution of the adhesive under the veneer. The results highlight that rare‐earth ions–doped nanoparticles with both excitation and emission in the NIR spectral range are advantageous for both PL‐based nanothermometry and imaging due to the reduced attenuation of NIR light by dental ceramics.