Implementing luminescence thermometry at 1.3 mu m using (GdNd)(2)O-3 nanoparticles
authors Balabhadra, S; Debasu, ML; Brites, CDS; Rocha, J; Carlos, LD
nationality International
journal JOURNAL OF LUMINESCENCE
author keywords Luminescence nanothermometry; Second biological window; Neodymium ions; Relative thermal sensitivity
keywords 2ND BIOLOGICAL WINDOW; CARBON NANOTUBES; ENERGY-TRANSFER; DRUG-DELIVERY; FLUORESCENCE; TEMPERATURE; SENSITIVITY; NM; NANOTHERMOMETERS; NANOCRYSTALS
abstract Nd3+-doped nanoparticles have recently emerged as very attractive multifunctional systems with potential for simultaneous bio-imaging and thermal sensing, due to near-infrared excitation and emission within the first (700-980 nm)and second (1000-1400 nm)biological windows. However, while these nanoparticles have been already used for thermal sensing in the first biological window very few studies concern the second biological window. Here, we show that upon 808 nm excitation a thermometer consisting of (Gd1-xNdx)(2)O-3(x=0.020, 0.028and 0.064)nanospheres exhibits a thermal sensitivity of 0.23 +/- 0.03% K-1 at 303 K, operating in the second transparent near infrared biological window. This sensitivity value is achieved by defining the thermometric parameter as the ratio between the integrated intensity of all the transitions originated from the (4)F(3/2)highest-energy Stark component and all the transitions from the (4)F(3/2)lowest-energy. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0022-2313
year published 2016
volume 180
beginning page 25
ending page 30
digital object identifier (doi) 10.1016/j.jlumin.2016.07.034
web of science category Optics
subject category Optics
unique article identifier WOS:000386314300005

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