"MATERIALS: World's darkest material comes to light"

The world's darkest material has been fabricated from vertical arrays of loosely packed carbon nanotubes. The project at Rensselaer Polytechnic Institute and Rice University resulted in a new material that absorbs 99.9 percent of incident light, enabling higher sensitivity and efficiency for applications ranging from solar panels to infrared sensors.
Text: http://www.eetimes.com/showArticle.jhtml?articleID=205920344