Time and wavelength-resolved laser-induced incandescence (LII) study is performed in a titania nanoparticle-generating flame under different laser fluences. Measurements of the flame light emission are performed during the laser pulse and at short delay times. The results cannot be explained within the traditional description of heat exchange mechanisms between particles and the environment. The paper suggests to distinguish electron and phonon temperatures in the nanoparticles in order to reconcile observations. The fundamental phenomenon responsible for a possibility of that temperature difference and its implication to pyrometry measurements in flames is discussed and justified in the paper.

Advancement in Comprehending the Evolution of Nanooxides in Flames using Laser Irradiation

De Iuliis S;
2022

Abstract

Time and wavelength-resolved laser-induced incandescence (LII) study is performed in a titania nanoparticle-generating flame under different laser fluences. Measurements of the flame light emission are performed during the laser pulse and at short delay times. The results cannot be explained within the traditional description of heat exchange mechanisms between particles and the environment. The paper suggests to distinguish electron and phonon temperatures in the nanoparticles in order to reconcile observations. The fundamental phenomenon responsible for a possibility of that temperature difference and its implication to pyrometry measurements in flames is discussed and justified in the paper.
2022
Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - ICMATE
nanooxides
light emission
laser irradiation
temperature evolution
electron-phonon coupling
File in questo prodotto:
File Dimensione Formato  
prod_458745-doc_181750.pdf

solo utenti autorizzati

Descrizione: Advancement in comprehending the evolution of nanooxides in flames using laser irradiation
Tipologia: Versione Editoriale (PDF)
Dimensione 1.84 MB
Formato Adobe PDF
1.84 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/402915
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? ND
social impact