Atomic surface diffusion on Pt nanoparticles quantified by high-resolution transmission electron microscopy

S Schneider; A Surrey; D Pohl; L Schultz; B Rellinghaus

doi:10.1016/j.micron.2013.12.011

Atomic surface diffusion on Pt nanoparticles quantified by high-resolution transmission electron microscopy

Micron. 2014 Aug:63:52-6. doi: 10.1016/j.micron.2013.12.011. Epub 2014 Jan 2.

Authors

S Schneider¹, A Surrey¹, D Pohl², L Schultz¹, B Rellinghaus³

Affiliations

¹ IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, D-01171 Dresden, Germany; TU Dresden, Institut für Festkörperphysik, D-01062 Dresden, Germany.
² IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, D-01171 Dresden, Germany.
³ IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, D-01171 Dresden, Germany. Electronic address: b.rellinghaus@ifw-dresden.de.

PMID: 24461627
DOI: 10.1016/j.micron.2013.12.011

Abstract

Aberration-corrected high-resolution transmission electron microscopy allows for the delocalization-free observation of atomic motions on metallic surfaces and thus enables measurements of the diffusion of single atoms on the surfaces of nanoscopic objects such as nanoparticles. Using this recently introduced method, the diffusion coefficient for surface self-diffusion of Pt nanoparticles is determined through the fluctuating occupation of the particle's atomic columns. This diffusion coefficient is determined to lie in the range D∼(10(-17)…10(-16)) cm(2)/s.

Keywords: Aberration-corrected HRTEM; Diffusion coefficient; Nanoparticles; Platin; Surface diffusion.