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.
Detection of fluorescent nanoparticles in flame with femtosecond laser-induced fluorescence anisotropy / A., Bruno; F., Ossler; DE LISIO, Corrado; P., Minutolo; Spinelli, Nicola; D'Alessio, Antonio. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 16:8(2008), pp. 5623-5632.
Detection of fluorescent nanoparticles in flame with femtosecond laser-induced fluorescence anisotropy
DE LISIO, CORRADO;SPINELLI, NICOLA;D'ALESSIO, ANTONIO
2008
Abstract
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.File | Dimensione | Formato | |
---|---|---|---|
opt.expr._08.pdf
non disponibili
Tipologia:
Documento in Post-print
Licenza:
Accesso privato/ristretto
Dimensione
203.27 kB
Formato
Adobe PDF
|
203.27 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.