Large Single-Crystal Cu Foils with High-Index Facets by Strain-Engineered Anomalous Grain Growth

Advanced Materials
Yanglizhi LiZhongfan Liu

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 su...Continue Reading

References

Feb 28, 2002·Physical Review Letters·M C DesjonquèresF Raouafi
Dec 2, 2010·Nano Letters·Haider I RasoolJames K Gimzewski
May 24, 2017·Proceedings of the National Academy of Sciences of the United States of America·Christopher HahnThomas F Jaramillo
Dec 22, 2017·Advanced Materials·Xiaozhi XuKaihui Liu
May 24, 2018·ACS Nano·Ming HuangRodney S Ruoff
Sep 11, 2019·Advanced Materials·Luzhao SunZhongfan Liu

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Citations

Nov 30, 2021·ACS Applied Materials & Interfaces·Weibo HuHui Yang
Jan 12, 2022·Chemical Society Reviews·Yi WanLain-Jong Li

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