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.
A molecular thermometer for nanoparticles for optical hyperthermia / S. Freddi, L. Sironi, R. D'Antuono, D. Morone, A. Donà, E. Cabrini, L. D'Alfonso, M. Collini, P. Pallavicini, G. Baldi, D. Maggioni, G. Chirico. - In: NANO LETTERS. - ISSN 1530-6984. - 13:5(2013 May 08), pp. 2004-2010. [10.1021/nl400129v]
A molecular thermometer for nanoparticles for optical hyperthermia
S. Freddi;D. Maggioni;
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.
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