Atomic Roughness Discovered on Sapphire Surface Challenges Theoretical Models of Aluminum Oxide

Researchers have discovered that the basal plane of aluminum oxide, known as α-Al2O3(0001) or sapphire, possesses a rough atomic structure rather than the smooth, ordered surface previously predicted by theoretical models. This finding challenges long-standing assumptions in surface chemistry and catalysis regarding how aluminum atoms arrange themselves on the material’s surface.

For decades, scientists relied on theoretical frameworks that suggested the sapphire surface maintained a uniform, well-ordered array of aluminum atoms. Recent observations contradict these models, revealing that the surface exhibits unexpected atomic-level roughness. This discrepancy between established theory and physical observation provides new data for researchers studying the material’s behavior in chemical reactions. These findings shift the current understanding of sapphire’s surface properties, which play a significant role in the fields of catalysis and material science.

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Date: June 3, 2026

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GOAI