A Molecular Thermometer for Nanoparticles for Optical Hyperthermia

A Molecular Thermometer for Nanoparticles for Optical Hyperthermia

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...

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Veröffentlicht in:Nano letters 2013-05, Vol.13 (5), p.2004-2010
Hauptverfasser: Freddi, Stefano, Sironi, Laura, D’Antuono, Rocco, Morone, Diego, Donà, Alice, Cabrini, Elisa, D’Alfonso, Laura, Collini, Maddalena, Pallavicini, Piersandro, Baldi, Giovanni, Maggioni, Daniela, Chirico, Giuseppe
Format: Artikel
Sprache:eng
Schlagworte:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Excitation
Gold
Gold - chemistry
Hyperthermia
Magnetite
Magnetite Nanoparticles - chemistry
Materials science
Metal Nanoparticles - chemistry
Monitoring
Nanocrystalline materials
Nanoparticles
Nanorods
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotubes
Optical Phenomena
Particle Size
Physics
Surface Properties
Temperature
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Beschreibung
Zusammenfassung: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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl400129v