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"Nano-Pancake" Sensor Warns With Color, Rice University Study


10/11/2012 7:58:30 AM

Super-thin, color-changing films could be part of cheap sensors for food spoilage or security, say researchers. The new work led by Rice University materials scientist Ned Thomas combines polymers into a unique, self-assembled metamaterial that, when exposed to ions in a solution or in the environment, changes color depending on the ions’ ability to infiltrate the hydrophilic (water-loving) layers. Possible applications include multiband optical elements in laser-driven systems, and as part of high-contrast displays.

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