A number of other groups have been working to make super-black materials from carbon nanotubes in recent years. A prime application for the material is in sensitive optical equipment, like telescopes. A NASA Goddard team, led by John Hagopian, has been developing nanotube materials since 2007.
To make the super-black material, they lay down a catalyst layer of iron oxide and then, in an 1,832 degree-Fahrenheit (750 C) oven, bathe the surface in carbon-enriched gas. The resulting multi-walled carbon nanotubes?nanotubes layered inside one another like Russian nesting dolls?can be grown on titanium, copper, and stainless steel.
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