I may have said this before, but great news for Art Directors, designers and typographers – we can now get an even blacker turtleneck! I did say I am wearing black until I find something darker, and finally, an MIT scientist team has actually found something darker. Eeeek, I’ve been using this joke since at least 04* when they discovered the blackest of blacks, and again when Vantablack appeared.
Like the moody perfectionist creative types, scientists seem to have a thing for black. Because light-absorption has other applications, of course. This time, however, the scientists weren’t even looking for this, they stumbled on it by happy accident. The material, which is 10 times blacker than anything ever before reported, is made from carbon nanotubes (CNTs) and cuts out over 99.99% of light.
Postdoc Kehang Cui, now a professor at Shanghai Jiao Tong University, and his team were experimenting with different ways to create CNTs. These are extremely thin tubes of carbon that are strong and excellent conductors of heat and electricity, very useful stuff, but they ran into a problem. They found that a layer of oxide would coat the aluminium as soon as it was exposed to air, and this layer stopped it from conducting heat and electricity thus making it useless. To remove the oxide layer, Wardle and colleagues used salt to dissolve the layer.
That’s when he noticed how dark it got;
“I remember noticing how black it was before growing carbon nanotubes on it, and then after growth, it looked even darker,” Cui recalls. “So I thought I should measure the optical reflectance of the sample.”
Now, in collaboration with Brian Wardle, professor of aeronautics and astronautics at MIT, and his group they looked into this more, to create something new.
“Our group does not usually focus on optical properties of materials, but this work was going on at the same time as our art-science collaborations with Diemut, so art influenced science in this case,” says Wardle.
Wardle and Cui, who have applied for a patent on the technology, are making the new CNT process freely available to any artist to use for a noncommercial art project.
Diemut Strebe is an artist-in-residence at the MIT Center for Art, Science, and Technology, and with this black in collaboration with Wardle and Cui, they coated a diamond with it.