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Kim, Ju-Young
Robust Multifunctional Materials Lab
Research Interests
  • Flexible / stretchable devices, nano-mechanics, nanoporous metal, materials reliability

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Self-similarity in the structure of coarsened nanoporous gold

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Title
Self-similarity in the structure of coarsened nanoporous gold
Author
Jeon, HansolKang, Na-RiGwak, Eun-JiJang, Jae-ilHan, Heung NamHwang, Jun YeonLee, SukbinKim, Ju-Young
Keywords
Annealing; 3D reconstruction; Focused ion beam (FIB); Cellular materials; Nanoporous gold
Issue Date
201708
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SCRIPTA MATERIALIA, v.137, no., pp.46 - 49
Abstract
Nanoporous gold (np-Au) samples of ligament sizes 68.6, 248.6, 462.9, and 710.9 nm are prepared by heat treatment, and representative volumes are reconstructed by focused ion beam (FIB) tomography. The increase in relative density by thermal coarsening is not pronounced. We analyze the distribution of ligament size, surface-to-volume ratio, and scaled connectivity density for coarsened np-Au, revealing that np-Au coarsens in a self-similar way. The measured activation energy for thermal coarsening supports that it is accomplished by surface diffusion of Au.
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DOI
http://dx.doi.org/10.1016/j.scriptamat.2017.05.009
ISSN
1359-6462
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