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Thursday, January 17, 2008
Darkest material on earth created
US researchers have made the darkest material on Earth, a substance so black it absorbs more than 99.9% of light. Made from tiny tubes of carbon standing on end, this material is almost 30 times darker than a carbon substance used by the US National Institute of Standards and Technology as the current benchmark of blackness. And the material is close to the long-sought ideal black, which could absorb all colors of light and reflect none. The substance has a total reflective index of 0.045% - which is more than three times darker than the nickel-phosphorous alloy that now holds the record as the world's darkest material. Basic black paint, by comparison, has a reflective index of 5% to 10%.
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