The researchers are seeking a world's darkest material designation by Guinness World Records. But their work will likely yield more than just bragging rights. It could also could be used in infrared detection or astronomical observation. It is composed of carbon nano-tubes, tiny tubes of tightly rolled carbon that are 400 hundred times smaller than the diameter of a strand of hair. The carbon helps absorb some of the light. These tubes are standing on end, much like a patch of grass. This arrangement traps light in the tiny gaps between the "blades". The researchers have also made the surface of this carbon nano-tube carpet irregular and rough to cut down on reflectivity. The researchers have tested the material on visible light only. Now they want to see how it fares against infrared and ultraviolet light, and other wavelengths such as radiation used in communications systems.