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3 articles from EurekAlert

Sapphires show their true colors: Not water-loving

The researchers investigated the wetting behavior of four different crystal surfaces of sapphire (alumina) single crystal and found that although the surface of polycrystalline alumina is hydrophilic (water contact angle was about 10°), the intrinsic water contact angles of all four crystal surfaces are greater than 10°. Among them, the (1-102) crystal surface is intrinsic hydrophobic, which...