Laser-induced incandescence of iron nanoparticles: effects of laser-induced sintering and coalescence.

ABSTRACT: While time-resolved laser-induced incandescence is a promising technique for characterizing metal nanoparticles in the gas phase, there remain several commonly observed and unexplained features in the data, including larger-than-predicted absorption cross-sections (excessive absorption) and faster-than-predicted cooling rates immediately following peak emission (apparent anomalous cooling). In the case of low melting point metals such as iron, laser-heated aggregates coalesce into spheres (i.e., fully sinter) before the peak of the LII signal is reached. Coalescence may affect the observed TiRe-LII signals in two ways: (i) the transition from aggregates to spheres reduces the absorption cross-section, which affects both the total absorbed laser energy and the intensity of the emitted incan

SUBMITTER: Robinson-Enebeli S 

PROVIDER: S-EPMC12159127 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature