We developed an all-optical method to measure the temperature on gold (nanorods and nanostars) and magnetite nanoparticles under near-infrared and radiofrequency excitation by monitoring the excited state lifetime of Rhodamine B that lies within ≅20 nm from the nanoparticle surface. We reached high temperature sensitivity (0.029 ± 0.001 ns/ C) and low uncertainty (±0.3 C). Gold nanostars are ≅3 and ≅100 times more efficient than gold nanorods and magnetite nanoparticles in inducing localized hyperthermia. © 2013 American Chemical Society.
Freddi, S., Sironi, L., D’Antuono, R., Morone, D., Donà, A., Cabrini, E., et al. (2013). A Molecular Thermometer for Nanoparticles for Optical Hyperthermia. NANO LETTERS, 13(5), 2004-2010 [10.1021/nl400129v].
A Molecular Thermometer for Nanoparticles for Optical Hyperthermia
FREDDI, STEFANO;SIRONI, LAURA;D'ALFONSO, LAURA;COLLINI, MADDALENA;CHIRICO, GIUSEPPE
2013
Abstract
We developed an all-optical method to measure the temperature on gold (nanorods and nanostars) and magnetite nanoparticles under near-infrared and radiofrequency excitation by monitoring the excited state lifetime of Rhodamine B that lies within ≅20 nm from the nanoparticle surface. We reached high temperature sensitivity (0.029 ± 0.001 ns/ C) and low uncertainty (±0.3 C). Gold nanostars are ≅3 and ≅100 times more efficient than gold nanorods and magnetite nanoparticles in inducing localized hyperthermia. © 2013 American Chemical Society.
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