Title
Three-dimensional elemental mapping at the atomic scale in bimetallic nanocrystalsThree-dimensional elemental mapping at the atomic scale in bimetallic nanocrystals
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Electron microscopy for materials research (EMAT)
Publication type
article
Publication
Washington,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Nano letters / American Chemical Society. - Washington
Volume/pages
13(2013):9, p. 4236-4241
ISSN
1530-6984
ISI
000330158900043
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A thorough understanding of the three-dimensional (3D) atomic structure and composition of coreshell nanostructures is indispensable to obtain a deeper insight on their physical behavior. Such 3D information can be reconstructed from two-dimensional (2D) projection images using electron tomography. Recently, different electron tomography techniques have enabled the 3D characterization of a variety of nanostructures down to the atomic level. However, these methods have all focused on the investigation of nanomaterials containing only one type of chemical element. Here, we combine statistical parameter estimation theory with compressive sensing based tomography to determine the positions and atom type of each atom in heteronanostructures. The approach is applied here to investigate the interface in coreshell Au@Ag nanorods but it is of great interest in the investigation of a broad range of nanostructures.
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