Aerosolized metal nanoparticles have numerous important applications in materials science, but their functionality depends strongly on their size. Very recently, time-resolved laser-induced incandescence (TiRe-LII) has been investigated as a technique to size aerosolized metal nanoparticles, but this procedure requires an accurate model of the heat transfer through which laser-energized particles re-equilibrate with the bath gas. This paper presents a model for laser-energized molybdenum nanoparticles, which is then applied to analyze experimental TiRe-LII measurements made on molybdenum nanoparticles formed by photolysis of Mo(CO)6 in helium, argon, nitrogen, and carbon dioxide. While it is possible to estimate the size distribution width, recovering nanoparticle sizes from TiRe-LII data requires independent knowledge of the thermal accommodation coefficient.

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