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|Title:||Boosting the sensitivity of Nd3+-based luminescent nanothermometers|
Debasu, Mengistie L.
Brites, Carlos D. S.
Nunes, Luis A. O.
Malta, Oscar L.
Carlos, Luis D.
|Publisher:||ROYAL SOC CHEMISTRY|
|Abstract:||Luminescence thermal sensing and deep-tissue imaging using nanomaterials operating within the first biological window (ca. 700-980 nm) are of great interest, prompted by the ever-growing demands in the fields of nanotechnology and nanomedicine. Here, we show that (Gd1-xNdx)(2)O-3 (x = 0.009, 0.024 and 0.049) nanorods exhibit one of the highest thermal sensitivity and temperature uncertainty reported so far (1.75 +/- 0.04% K-1 and 0.14 +/- 0.05 K, respectively) for a nanothermometer operating in the first transparent near infrared window at temperatures in the physiological range. This sensitivity value is achieved using a common R928 photomultiplier tube that allows defining the thermometric parameter as the integrated intensity ratio between the F-4(5/2) -> I-4(9/2) and F-4(3/2) -> I-4(9/2) transitions (with an energy difference between the barycentres of the two transitions > 1000 cm(-1)). Moreover, the measured sensitivity is one order of magnitude higher than the values reported so far for Nd3+-based nanothermometers enlarging, therefore, the potential of using Nd3+ ions in luminescence thermal sensing and deep-tissue imaging.|
|Appears in Collections:||CICECO - Artigos|
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|Boosting the sensitivity of Nd3+-based luminescent nanothermometers_10.1039c5nr05631d.pdf||1.21 MB||Adobe PDF|
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