title: Revealing the distribution of the atoms within individual bimetallic catalyst nanoparticles.
abstract: To be able to correlate the catalytic properties of nanoparticles with their structure, detailed knowledge about their make-up on the atomic level is required. Herein, we demonstrate how atom-probe tomography (APT) can be used to quantitatively determine the three-dimensional distribution of atoms within a Au@Ag nanoparticle with near-atomic resolution. We reveal that the elements are not evenly distributed across the surface and that this distribution is related to the surface morphology and residues from the particle synthesis.
authors.affiliation: School for Aerospace, Mechanical and Mechatronic Engineering/Australian Centre for Microscopy and Microanalysis, The University of Sydney, Madsen Building F09, NSW 2006 (Australia).
authors.forename: Peter
authors.initials: P
authors.lastname: Felfer
authors.forename: Paul
authors.initials: P
authors.lastname: Benndorf
authors.forename: Anthony
authors.initials: A
authors.lastname: Masters
authors.forename: Thomas
authors.initials: T
authors.lastname: Maschmeyer
authors.forename: Julie M
authors.initials: JM
authors.lastname: Cairney
keywords: atom-probe tomography; heterogeneous catalysts; nanoparticles; silver; surface analysis