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Abstract
Palladium nanoparticles, with potential interest for various applications in catalysis, have been studied by Transmission Electron Microscopy (TEM). In order to ascertain the exact morphology of these particles, electron tomography was perfomed in the Scanning TEM, High Angle Annular Dark Field (STEM–HAADF) imaging mode. Several geometrical forms have thus been characterized three-dimensionally at the nanometre scale, among them pentagonal rods and more complex bipyramidal nanocrystals.
Acknowledgements
The authors are indebted to the CLYM (Centre Lyonnais de Microscopie) for the access to the JEOL 2010F microscope. Thanks are due to H. Idrissi and J. Bigot (MATEIS) in the development of the ‘tomographic’ specimen holder tip. D.R.G. Mitchell (ANSTO Materials), M. Ribardiére (JEOL Europe S.A.), B. Krauss, and R. Rodemeier (Gatan Gmbh) are gratefully acknowledged for their advices in scripting and programing.