Detection of fluorescent nanoparticles in flame with femtosecond laser-induced fluorescence anisotropy

Research output: Contribution to journalArticle


The mean size of fluorescent nanoparticles produced in a propane flame has been measured with an in-situ technique employing a femtosecond laser to excite the sample and a streak camera for time-resolved detection of the fluorescence. The time profile of the fluorescence anisotropy showed a Gaussian behaviour, typical of free rotor reorientation. By measuring its width, we estimated an average carbon particle diameter of 3.3 nm, thus confirming the existence of combustion produced nanoparticles. The technique proves to be applicable to the study of gas-phase nanoparticles, both in combustion and environmental studies.


  • Annalisa Bruno
  • Frederik Ossler
  • Corrado de Lisio
  • Patrizia Minutolo
  • Nicola Spinelli
  • Antonio D'Alessio
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Pages (from-to)5623-5632
JournalOptics Express
Issue number8
Publication statusPublished - 2008
Publication categoryResearch