Nano paint could render aircraft invisible to radar

TechnologyReview.com reports that a nanotube coating would allow an aircraft to absorb a radar beam, making it undetectable.
The new nanostructured coating could be used to make paints for stealth aircraft that can´t be seen at night and that are undetectable by radar at any time of day.
The long straws of pure carbon, each just a few nanometers in diameter, absorb a broad spectrum of light—from radio waves through visible light through the ultraviolet—almost perfectly.
Researchers are taking advantage of this perfect absorbance in highly sensitive imaging sensors and other prototype devices.

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