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Publisher DOI: 10.1149/2.1681704jes
Title: Nanoporous gold by alloy corrosion : method-structure-property relationships
Language: English
Authors: Graf, Matthias 
Roschning, Benedikt 
Weissmüller, Jörg 
Keywords: catalysis;corrosion;dealloying;nanoindentation;nanoporous gold;nanoporous metal
Issue Date: 4-Mar-2017
Publisher: Electrochemical Society (ECS)
Source: Journal of the Electrochemical Society 4 (164): C194-C200 (2017)
Journal or Series Name: Journal of the Electrochemical Society 
Abstract (english): Nanoporous gold (NPG) made by selective corrosion, or dealloying, serves as a model system for the investigation of electrochemical and mechanical properties of nanomaterials. While various dealloying protocols are in use, it is typically assumed that the structural characteristics are identical and independent of the preparation technique. Yet, reported properties such as strength, Young's modulus, or catalytic behavior can vary widely. Here, we compare the microstructure and the mechanical behavior of NPG structures prepared by three different synthesis protocols reported in the literature. We find that corrosion rates, the content of residual sacrificial metal, the average ligament size and the densification by shrinkage strongly depend on the synthesis protocol and show the consequences on the mechanical properties. We finally deduce different correlations between microstructure and composition for different dealloying routes.
DOI: 10.15480/882.2011
ISSN: 1945-7111
Institute: Werkstoffphysik und -technologie M-22 
Type: (wissenschaftlicher) Artikel
Funded by: Deutsche Forschungsgemeinschaft (DFG)
Project: FOR 2213: Teilprojekt "Gefügeentwicklung und Auswirkungen der Mechanik auf die Katalyse" 
License: CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives) CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
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