Hollow nanostructures based on the Kirkendall effect : Design and stability considerations

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Detail(s)

Original languageEnglish
Article number093111
Pages (from-to)1-3
Journal / PublicationApplied Physics Letters
Volume86
Issue number9
Publication statusPublished - 28 Feb 2005
Externally publishedYes

Abstract

In nanoscale interdiffusion and reaction, a Kirkendall void in the core of a nanocrystal has been proposed to explain the formation of hollow nanosize particles in recent literature. We present here a simple kinetic analysis of the reaction in nanoparticles, including the effect of the Gibbs-Thomson potential. A general discussion on how to form hollow nanostructures utilizing the mechanism of the Kirkendall effect is given. Furthermore, we show that a hollow nanosize particle is thermodynamically unstable; a high-temperature aging will drive thermal vacancies to the outer surface and transform the hollow nanocrystal to a solid nanocrystal. © 2005 American Institute of Physics.

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