De Lisio, Corrado and D'Alessio, Antonio (2006) Characterization of ultrafast fluorescence from nanometric carbon particles. [Pubblicazione in rivista scientifica]

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Tipologia del documento: Pubblicazione in rivista scientifica
Lingua: English
Titolo: Characterization of ultrafast fluorescence from nanometric carbon particles
Autori:
AutoreEmail
De Lisio, Corrado[non definito]
D'Alessio, Antonio[non definito]
Autore/i: A. Bruno, C. de Lisio, P. Minutolo, A. D'Alessio
Data: 2006
Numero di pagine: 7
Dipartimento: Scienze fisiche
Numero identificativo: 10.1088/1464-4258/8/7/S44
URL ufficiale: stacks.iop.org/JOptA/8/S578
Titolo del periodico: JOURNAL OF OPTICS. A, PURE AND APPLIED OPTICS
Editore: IOP Publishing Limited:Dirac House, Temple Back, Bristol BS1 6BE United Kingdom:011 44 117 9297481, EMAIL: custserv@iop.org, INTERNET: http://www.iop.org, Fax: 011 44 117 9294318
Data: 2006
Volume: 8
Intervallo di pagine: S578-S584
Numero di pagine: 7
Parole chiave: Nanometric particles, Fluorescence anisotropy, Carbon particles
Numero identificativo: 10.1088/1464-4258/8/7/S44
Depositato il: 20 Ott 2010 08:01
Ultima modifica: 30 Apr 2014 19:42
URI: http://www.fedoa.unina.it/id/eprint/6546

Abstract

We present two distinct implementations of the time resolved fluorescence polarization anisotropy (TRFPA) technique for the analysis of carbon nanoparticles collected from laminar laboratory flames and from the exhaust of a gasoline vehicle engine. By exploiting the high time-resolution and the spectral resolution of our TRFPA setups, we could identify two groups of particles, with diameter of 1.4 and 2.2 nm, respectively, within the laminar flame sample. On the other hand, the high time-resolution TRFPA analysis of the gasoline sample led to the identification of two distinct decay channels. The slower one was consistent with a single kind of small particle with diameter of 1.3 nm. Moreover, an analysis of the fast decay versus the temperature allowed us to rule out that it was due to the presence of lighter particles within the sample. Most likely, it is related to the relaxation of internal degrees of freedom.

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