Abstract
For a polydisperse nanoparticle ensemble the evaluation of time-resolved laser-induced incandescence (LII) measurements yields a weighted average value for the primary nanoparticle size. Although this value is sufficient for narrow size distributions, a comprehensive characterization of a particle-evolution process requires the reconstruction of the size distribution. An easy-to-use online approach is presented to evaluate the LII signal regarding higher moments of the distribution. One advantage of this approach is that the size distribution results in a deceleration of the LII signal decay with time after the laser pulse. Therefore LII signal-decay curves are evaluated in two different time intervals after the laser pulse, providing information about the desired distribution parameters that has been tested successfully with experimental curves taken in different soot-formation processes.
© 2004 Optical Society of America
Full Article | PDF ArticleMore Like This
Thilo Lehre, Beate Jungfleisch, Rainer Suntz, and Henning Bockhorn
Appl. Opt. 42(12) 2021-2030 (2003)
Stefan Will, Stephan Schraml, Katharina Bader, and Alfred Leipertz
Appl. Opt. 37(24) 5647-5658 (1998)
Boman Axelsson, Robert Collin, and Per-Erik Bengtsson
Appl. Opt. 39(21) 3683-3690 (2000)