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Nanotwinned silver nanowires: Structure and mechanical properties

Kobler, Aaron and Beuth, Thorsten and Klöffel, Tobias and Prang, Robby and Moosmann, Markus and Scherer, Torsten and Walheim, Stefan and Hahn, Horst and Kübel, Christian and Meyer, Bernd and Schimmel, Thomas and Bitzek, Erik (2015):
Nanotwinned silver nanowires: Structure and mechanical properties.
92, In: Acta Materialia, PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND, pp. 299-308, ISSN 13596454, [Online-Edition: http://dx.doi.org/10.1016/j.actamat.2015.02.041],
[Article]

Abstract

Ag nanowires have been manufactured with the ultrathin layer electrochemical deposition method. Transmission electron microscopy revealed a multiple twinned nanostructure that has not been reported in comparable structures using a non-template self-assembling preparation method. The {1 1 1} twin planes are oriented parallel to the < 1 1 2 > wire axis. The influence of the twin boundaries on the elastic and plastic properties of these wires has been investigated. Atomistic calculations revealed no influence of the twin boundaries on the Young's modulus of the wire for this geometry and along the < 1 1 2 > direction. However, the twin boundaries exhibited a strong orientation-dependent influence on the plastic deformation when indented orthogonal (< 1 1 1 > direction) or parallel (< 1 1 0 > direction) to the twin boundaries, reflecting the interaction between the glide systems active in fcc metals and the stress direction. Heating experiments showed a high heat resistance for the twin boundaries till sublimation in an in situ TEM heating experiment. Sublimation followed the twin boundaries, indicating the lower binding energy of hcp stacking in comparison to fcc stacking. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type: Article
Erschienen: 2015
Creators: Kobler, Aaron and Beuth, Thorsten and Klöffel, Tobias and Prang, Robby and Moosmann, Markus and Scherer, Torsten and Walheim, Stefan and Hahn, Horst and Kübel, Christian and Meyer, Bernd and Schimmel, Thomas and Bitzek, Erik
Title: Nanotwinned silver nanowires: Structure and mechanical properties
Language: English
Abstract:

Ag nanowires have been manufactured with the ultrathin layer electrochemical deposition method. Transmission electron microscopy revealed a multiple twinned nanostructure that has not been reported in comparable structures using a non-template self-assembling preparation method. The {1 1 1} twin planes are oriented parallel to the < 1 1 2 > wire axis. The influence of the twin boundaries on the elastic and plastic properties of these wires has been investigated. Atomistic calculations revealed no influence of the twin boundaries on the Young's modulus of the wire for this geometry and along the < 1 1 2 > direction. However, the twin boundaries exhibited a strong orientation-dependent influence on the plastic deformation when indented orthogonal (< 1 1 1 > direction) or parallel (< 1 1 0 > direction) to the twin boundaries, reflecting the interaction between the glide systems active in fcc metals and the stress direction. Heating experiments showed a high heat resistance for the twin boundaries till sublimation in an in situ TEM heating experiment. Sublimation followed the twin boundaries, indicating the lower binding energy of hcp stacking in comparison to fcc stacking. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Journal or Publication Title: Acta Materialia
Volume: 92
Publisher: PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND
Uncontrolled Keywords: Nanowire, Nanotwinned, Elastic-plastic properties, In situ TEM heating and straining, DFT & EAM calculations
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 10 Feb 2016 09:04
Official URL: http://dx.doi.org/10.1016/j.actamat.2015.02.041
Identification Number: doi:10.1016/j.actamat.2015.02.041
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