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In situ nanoparticle size measurements of gas-borne silicon nanoparticles by time-resolved laser-induced incandescence |
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| Authors: | T A Sipkens R Mansmann K J Daun N Petermann J T Titantah M Karttunen H Wiggers T Dreier C Schulz |
| Institution: | 1. Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave West, Waterloo, ON, N2L 3G1, Canada 2. Institute for Combustion and Gas Dynamics – Reactive Fluids (IVG), University of Duisburg-Essen, Duisburg, Germany 3. Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Duisburg, Germany 4. Department of Applied Mathematics, Western University, London, ON, Canada 5. Department of Chemistry, University of Waterloo, Waterloo, ON, Canada |
| Abstract: | This paper describes the application of time-resolved laser-induced incandescence (TiRe-LII), a combustion diagnostic used mainly for measuring soot primary particles, to size silicon nanoparticles formed within a plasma reactor. Inferring nanoparticle sizes from TiRe-LII data requires knowledge of the heat transfer through which the laser-heated nanoparticles equilibrate with their surroundings. Models of the free molecular conduction and evaporation are derived, including a thermal accommodation coefficient found through molecular dynamics. The model is used to analyze TiRe-LII measurements made on silicon nanoparticles synthesized in a low-pressure plasma reactor containing argon and hydrogen. Nanoparticle sizes inferred from the TiRe-LII data agree with the results of a Brunauer–Emmett–Teller analysis. |
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