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Thin, Colorful Carbon Films

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Hank Hogan

A research group comprising members from Tohoku University in Sendai, Japan, and from Peking University has found that when a thin anodic aluminum oxide (AAO) film on an aluminum substrate is coated uniformly with carbon, the result is an enhancement of the interference color saturation. Thus, the coated film exhibits a brilliant color that is tunable by varying the film thickness. An anodic aluminum oxide film with nanoscale channels at the surface sits on top of an aluminum substrate (top left). The film is coated with a thin layer of carbon, resulting in bulk carbon and carbon...Read full article

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