De Lisio, Corrado and D'Alessio, Antonio (2006) Characterization of ultrafast fluorescence from nanometric carbon particles. [Pubblicazione in rivista scientifica]
Il contenuto (Full text) non è disponibile all'interno di questo archivio.| Tipologia del documento: | Pubblicazione in rivista scientifica | ||||||
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| Lingua: | English | ||||||
| Titolo: | Characterization of ultrafast fluorescence from nanometric carbon particles | ||||||
| Autori: |
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| 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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