A molecular thermometer for nanoparticles for optical hyperthermia

Stefano Freddi, Laura Sironi, Rocco D'Antuono, Diego Morone, Alice Donà, Elisa Cabrini, Laura D'Alfonso, Maddalena Collini, Piersandro Pallavicini, Giovanni Baldi, Daniela Maggioni, Giuseppe Chirico

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)2004-2010
Number of pages7
JournalNano Letters
Issue number5
Publication statusPublished - May 8 2013


  • Fluorescence
  • gold nanoparticles
  • hyperthermia
  • near-infrared
  • thermology

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering
  • Medicine(all)


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