We present a new implementation of the time-resolved fluorescence anisotropy technique for the analysis of carbon nanoparticles directly in a Bunsen-type propane flame. By exploiting femtosecond laser excitation, UV–visible laser-induced fluorescence and time resolution of the experimental set-up, small soot nanoparticles have been Identified within the flame. From the measurement of the decay time of the anisotropy ratio, we determined an ensemble-averaged diameter of the carbon particles of approximately 10 nm, with a slightly larger value in the outer edge of the flame compared to its centre.
In situ detection of soot nanoparticles by time-resolved fluorescence analysis / A., Bruno; F., Ossler; P., Minutolo; DE LISIO, Corrado. - In: JOURNAL OF OPTICS. A, PURE AND APPLIED OPTICS. - ISSN 1464-4258. - ELETTRONICO. - 10:(2008), pp. 064016-1-064016-5. [10.1088/1464-4258/10/6/064016]
In situ detection of soot nanoparticles by time-resolved fluorescence analysis
DE LISIO, CORRADO
2008
Abstract
We present a new implementation of the time-resolved fluorescence anisotropy technique for the analysis of carbon nanoparticles directly in a Bunsen-type propane flame. By exploiting femtosecond laser excitation, UV–visible laser-induced fluorescence and time resolution of the experimental set-up, small soot nanoparticles have been Identified within the flame. From the measurement of the decay time of the anisotropy ratio, we determined an ensemble-averaged diameter of the carbon particles of approximately 10 nm, with a slightly larger value in the outer edge of the flame compared to its centre.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
