Evidence of fluorescent carbon nanoparticles produced in premixed flames by time-resolved fluorescence polarization anisotropy (Articolo in rivista)

Type
Label
  • Evidence of fluorescent carbon nanoparticles produced in premixed flames by time-resolved fluorescence polarization anisotropy (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.combustflame.2007.06.014 (literal)
Alternative label
  • A. Bruno (a); C. de Lisio (a); P. Minutolo (b); A. D'Alessio (c) (2007)
    Evidence of fluorescent carbon nanoparticles produced in premixed flames by time-resolved fluorescence polarization anisotropy
    in Combustion and flame; Elsevier Science Inc., New York (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Bruno (a); C. de Lisio (a); P. Minutolo (b); A. D'Alessio (c) (literal)
Pagina inizio
  • 472 (literal)
Pagina fine
  • 481 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0010218007001708 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 151 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a) Centro di Ricerca e Sviluppo \"Coherentia,\" C.N.R.-I.N.F.M., Unità di Ricerca di Napoli, and Dipartimento di Scienze Fisiche, Università di Napoli \"Federico II,\" Complesso di Monte S. Angelo, Via Cintia, 80126, Napoli, Italy b) Istituto di Ricerche sulla Combustione, CNR, P.le Tecchio, 80, 80126, Napoli, Italy c) Dipartimento di Ingegneria Chimica, Università di Napoli \"Federico II,\" P.le Tecchio, 80, 80126, Napoli, Italy (literal)
Titolo
  • Evidence of fluorescent carbon nanoparticles produced in premixed flames by time-resolved fluorescence polarization anisotropy (literal)
Abstract
  • In this work we report on the analysis of combustion-generated nano-organic carbon (NOC) particles by means of time-resolved fluorescence polarization anisotropy (TRFPA). NOC samples were collected in water from non-sooting regions of ethylene/air laminar flames. The size of collected particles was determined with subnanometer accuracy by exploiting fermosecond laser pulses as an excitation source. Moreover, the TRFPA measurements were realized by selecting narrow-wavelength bands within the fluorescence spectrum. With this procedure, the ensemble-averaged size of particles emitting in the selected fluorescence band was determined, to provide additional information on composition and spectroscopic properties of the investigated particles. In particular, the NOC samples consisted of two groups of particles, preferentially emitting in two distinct wavelength bands: smaller particles, with diameter d = 1-1.5 nm, mostly fluorescing in the UV (lambda similar to 300-470 nm), and larger particles, d > 2 nm, fluorescing in the visible (lambda similar to 490-580 nm). The results of this work strongly support the attribution of UV/visible fluorescence generally detected in flames to nanoparticles. They also evidence that nanoparticles undergo a chemical transformation during the growth process, which produces a red shift in the fluorescence spectrum. (literal)
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