Extended Data Fig. 5: Temperature-difference-driven single-seed abnormal grain growth.
From: Seeded growth of large single-crystal copper foils with high-index facets
a, Simulated temperature distribution in the Cu foil. The upper and lower areas of the central part of the Cu foil have the highest temperature. b–d, Measurement of the temperature difference. Nine pieces of Ag foil were placed into our furnace and were then annealed at 955 °C (b), 960 °C (c) and 965 °C (d). With increasing temperature, different parts melted; the temperature difference was estimated to be ~10 °C. The image sizes for b–d are ~40 × 22 cm2. e–h, Typical single-crystal evolution in our abnormal grain growth with a temperature difference.
