Characterization of nanometric carbon materials by time-resolved fluorescence polarization anisotropy

DE LISIO, CORRADO (2006) Characterization of nanometric carbon materials by time-resolved fluorescence polarization anisotropy. [Pubblicazione su rivista scientifica]

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In this work, time-resolved fluorescence polarization anisotropy (TRFPA) technique has been applied to the determination of the average size of asphaltenes and combustion-generated carbon nanoparticles. The characteristic depolarization time of fluorescence light following photon absorption is related to the typical particle size through the Stoke–Einstein rotational diffusion equation. The TRFPA technique employed in our experiment achieves subnanosecond time resolution, roughly corresponding to sub-nanometer accuracy in determining the particle size. The technique has been applied to both asphaltene and carbon nanoparticles, the former being a component of petroleum, whereas the latter result from combustion processes. Therefore, a complete and reliable characterization of such particles is of great importance in oil industry and atmospheric physics, respectively. Although the TRFPA technique has been developed and widely used on molecular and biological samples, it proves to be a very powerful tool for measuring the size of asphaltene and soot particles as small as few nanometers with a resolution of the order of 0.1 nm.

Tipologia di documento:Pubblicazione su rivista scientifica
Parole chiave:Nanometric particulate, Fluorescence anisotropy, Carbon materials
Settori scientifico-disciplinari MIUR:Non specificato
Stato del full text:Accessibilità ristretta
Altri Autori:A. Bruno, M. Alfè, B. Apicella, C. de Lisio, P. Minutolo
Editore:-London: Applied Science Publishers. -Elsevier Applied Science:An Imprint of Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington Oxford OX5 1GB United Kingdom:011 44 1865 843000, 011 44 1865 843699, EMAIL: OR usinfo-f@els
Numero di pagine:15
Intervallo di pagina:pp. 732-746
Dipartimento o Struttura:Dipartimento di Scienze Fisiche
Numero identificativo:10.1016/j.optlaseng.2005.03.013
Titolo rivista/pubblicazione:OPTICS AND LASERS IN ENGINEERING
Numero di sistema:6547
Depositato il:20 Ottobre 2010 10:01
Ultima modifica:20 Ottobre 2010 10:01

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