Ultraflat metal foils are important for the growth of high quality 2D materials, but their fabrication remains challenging. Here, the authors report a surface-acoustic-wave-assisted annealing method to flatten the surface of commercial Cu foils, leading to the growth of 2D graphene and hexagonal boron nitride with enhanced anti-corrosion properties.
- Bo Tian
- Junzhu Li
- Zheng Liu
