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Estimation of particle size distributions obtained by gas phase processes

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Abstract

Nanoparticles intended for high value added applications often require special size distributions. Based on model calculations, this article compares the particle size distributions obtained with conventional and plasma processes. The model is based on an estimation of the probability for collisions; either for neutral or equally charged particles, whereas the growth of the particles is calculated using a model derived from Markov chains. The results of these calculations confirm the empirical knowledge that, under the special conditions of particles carrying electric charges of equal sign, plasma processes deliver products with the narrowest particle size distribution. Synthesis of extremely small particles with conventional processes leads to a significant residue of unreacted precursor. This finding is important in cases of expensive educts. The results of these model calculations are in perfect agreement with experimental findings.

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  1. NanoConsulting, Primelweg 3, 76297, Stutensee, Germany

    Dieter Vollath

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  1. Dieter Vollath
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Correspondence to Dieter Vollath.

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Vollath, D. Estimation of particle size distributions obtained by gas phase processes. J Nanopart Res 13, 3899–3909 (2011). https://doi.org/10.1007/s11051-011-0343-x

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  • DOI: https://doi.org/10.1007/s11051-011-0343-x

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