IN SITU PARTICLE SIZE MEASUREMENTS OF GAS-BORNE SILICON NANOPARTICLES BY TIME-RESOLVED LASER-INDUCED INCANDESCENCE
TA Sipkens and N Petermann and KJ Daun and J Titantah and M Karttunen and H Wiggers and T Dreier and C Schulz, PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE - 2013, VOL 1, V001T03A001 (2014).
The functionality of silicon nanoparticles is strongly size-dependent, so there is a pressing need for laser diagnostics that can characterize aerosolized silicon nanoparticles. The present work is the first attempt to extend time-resolved laser-induced incandescence (TiRe-LII), a combustion diagnostic used for sizing soot, to size silicon nanoparticles. TiRe-LII measurements are made on silicon nanoparticles synthesized in a low-pressure plasma reactor containing argon. Molecular dynamics (MD) is used to predict the accommodation coefficient between silicon nanoparticles and argon and helium, which is needed to interpret the TiRe-LII data. The MD-derived thermal accommodation coefficients will be validated by comparing them to experimentally-derived values found using transmission electron microscopy (TEM) and Brunauer-Emmett- Teller (BET) analysis.
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