Document Detail


Quantitative measurement of the surface self-diffusion on Au nanoparticles by aberration-corrected transmission electron microscopy.
MedLine Citation:
PMID:  23136983     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We present a method that allows for a quantitative measurement of the surface self-diffusion on nanostructures, such as nanoparticles, at the atomic scale using aberration-corrected high-resolution transmission electron microscopy (HRTEM). The diffusion coefficient can be estimated by measuring the fluctuation of the atom column occupation at the surface of Au nanoparticles, which is directly observable in temporal sequences of HRTEM images. Both, a Au icosahedron and a truncated Au octahedron are investigated and their diffusion coefficients are found to be in the same order of magnitude, D= 10^-17...10^-16 cm^2/s. It is to be assumed that the measured surface diffusion is affected by the imaging electron beam. This assumption is supported by the observed instability of a (5 x 1) surface reconstruction on a {100} Au facet.
Authors:
Alexander Surrey; Darius Pohl; Ludwig Schultz; Bernd Rellinghaus
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-8
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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