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.

Volume Subject Area:
Theory and Fundamental Research in Heat Transfer
Topics:
Lasers, Light emission, Nanoparticles, Particle size, Silicon, Tires, Combustion, Helium, Molecular dynamics, Plasmas (Ionized gases), Pressing, Pressure, Soot, Transmission electron microscopy
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Copyright © 2013 by ASME
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