Self-similarity in the structure of coarsened nanoporous gold
- Self-similarity in the structure of coarsened nanoporous gold
- 황준연; 전한솔; 강나리; 곽은지; 장재일; 한흥남; 이석빈; 김주영
- 3D microstructure; FIB
- Issue Date
- Scripta materialia
- VOL 137-49
- 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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