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

• DOI: 10.1002/adma.202002034
• Publication Date: 2020-06-12T06:11:04Z
• Authors: Yanglizhi Li; Luzhao Sun; Zhenghua Chang; Haiyang Liu; Yuechen Wang; Yu Liang; Buhang Chen; Qingjie Ding; Zhenyong Zhao; Ruoyu Wang; Yujie Wei; Hailin Peng; Li Lin; Zhongfan Liu
• Keywords: Strain (injury)

Abstract The rich and complex arrangements of metal atoms in high‐index facets afford appealing physical chemical properties, which attracts extensive research interest material science for the applications catalysis surface chemistry. However, it is still a challenge to prepare large‐area single crystals controllable cost‐efficient manner. Herein, entire commercially available decimeter‐sized polycrystalline Cu foils are successfully transformed into with series facets, relying on strain‐engineered anomalous grain growth technique. introduction moderate thermal‐contact stress upon foil during annealing leads formation grains dominated by thermal strain foils, rather than (111) driven energy. Besides, designed static gradient temperature enables as‐formed seed expand throughout foil. as‐received can serve as templates producing single‐crystal Cu‐based alloys. This work provides an basis epitaxial 2D materials, that require unique structures their