Nanoparticle Growth via the Precipitation Method
We consider a model for the evolution of a system of nanoparticles in solution via the processes of size focusing and Ostwald ripening. The model consists of a diffusion equation for the concentration of the solution, a Stefan-type condition to track the particle-liquid interfaces and a time-dependent expression for the bulk concentration obtained via mass conservation. Based on a small dimensionless parameter we propose a pseudo-steady state model, which is solved numerically to obtain the average particle radius and standard deviation. The results are shown to be in good agreement with experimental data for cadmium selenide nanoparticles.
V. Cregan, H. Ribera and M.C. Schwarzwälder were supported by “la Caixa” foundation grant. T. Myers acknowledges the support of a Ministerio de Ciencia e Innovación Grant MTM2011-23789. S.L. Mitchell acknowledges the support of the Mathematics Applications Consortium for Science and Industry (www.macsi.ul.ie) funded by the Science Foundation Ireland grant 12/IA/1683.
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