A new method for automated shape measurement of embedded nanoparticles

The shape of particles or inclusions is closely related to physical properties such as growth rates or surface energies. In this article we introduce an automated method to make objective and accurate shape measurements on large numbers of particles recorded by in-situ transmission electron microscopy. By treating the particle shape as a mathematical curve manipulations that exploit the known particle geometry can be executed and a measure for the shape that is related to the particle's physical properties is determined. The application of this program enabled us to resolve the controversy about the anisotropy of the interfacial energy in the system Pb-Al.