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Large Single-Crystal Cu Foils with High-Index Facets by Strain-Engineered Anomalous Grain Growth
- Source :
- Advanced materials (Deerfield Beach, Fla.). 32(29)
- Publication Year :
- 2020
-
Abstract
- The rich and complex arrangements of metal atoms in high-index metal facets afford appealing physical and chemical properties, which attracts extensive research interest in material science for the applications in catalysis and surface chemistry. However, it is still a challenge to prepare large-area high-index single crystals in a controllable and cost-efficient manner. Herein, entire commercially available decimeter-sized polycrystalline Cu foils are successfully transformed into single crystals with a series of high-index facets, relying on a strain-engineered anomalous grain growth technique. The introduction of a moderate thermal-contact stress upon the Cu foil during the annealing leads to the formation of high-index grains dominated by the thermal strain of the Cu foils, rather than the (111) surface driven by the surface energy. Besides, the designed static gradient of the temperature enables the as-formed high-index grain seed to expand throughout the entire Cu foil. The as-received high-index Cu foils can serve as the templates for producing high-index single-crystal Cu-based alloys. This work provides an appealing material basis for the epitaxial growth of 2D materials, and the applications that require the unique surface structures of high-index metal foils and their alloys.
- Subjects :
- Materials science
Annealing (metallurgy)
Mechanical Engineering
Nanotechnology
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Epitaxy
01 natural sciences
Surface energy
0104 chemical sciences
Grain growth
Strain engineering
Mechanics of Materials
General Materials Science
Crystallite
0210 nano-technology
Single crystal
FOIL method
Subjects
Details
- ISSN :
- 15214095
- Volume :
- 32
- Issue :
- 29
- Database :
- OpenAIRE
- Journal :
- Advanced materials (Deerfield Beach, Fla.)
- Accession number :
- edsair.doi.dedup.....74cdc86a6697be51b169242487d5d349