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Journal of Nanomaterials
Volume 2014, Article ID 821584, 7 pages
http://dx.doi.org/10.1155/2014/821584
Research Article

Ostwald Ripening of the Platinum Nanoparticles in the Framework of the Modified LSW Theory

Yuriy Fedkovych National University of Chernivtsi, Ukraine

Received 25 February 2014; Accepted 1 June 2014; Published 9 September 2014

Academic Editor: Shijun Liao

Copyright © 2014 R. D. Vengrenovich et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An analysis of the experimental data related to the mechanism of Pt particles sintering has been carried out using the modified LSW theory. The size distribution for the Pt nanoparticles at the stage of Ostwald ripening fits the generalized Lifshitz-Slyozov-Wagner model calculated with the assumption of two parallel mechanisms involved in the nanoparticles growth (dissolution): diffusion and Wagner’s (controlled by the chemical reaction rate). Comparison between the experimental histograms and the curves calculated theoretically proves the governing role of the Wagner’s mechanism (chemical reaction) in the Pt nanoparticles growth.