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http://hdl.handle.net/10773/20010
Title: | Boosting the sensitivity of Nd3+-based luminescent nanothermometers |
Author: | Balabhadra, Sangeetha Debasu, Mengistie L. Brites, Carlos D. S. Nunes, Luis A. O. Malta, Oscar L. Rocha, Joao Bettinelli, Marco Carlos, Luis D. |
Keywords: | OPTICAL-TEMPERATURE SENSORS NANOSCALE NANOPARTICLES THERMOMETRY EMISSION FLUORESCENCE ND3+ NANORODS RANGE |
Issue Date: | 2015 |
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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20010 |
DOI: | 10.1039/c5nr05631d |
ISSN: | 2040-3364 |
Publisher Version: | 10.1039/c5nr05631d |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Boosting the sensitivity of Nd3+-based luminescent nanothermometers_10.1039c5nr05631d.pdf | 1.21 MB | Adobe PDF |
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