
[fig. 1: carbon nanotubes]
From the frontiers of human knowledge:
A group of nanotechnology researchers at Rensselaer Polytechnic have succeeded in creating “the blackest material known to science”. By shaping a whole bunch of carbon nanotubes into a light-sucking ‘forest’ of darkness, the Rensselaer group came up with a hockey puck of extremely black, extremely chic metal which absorbs 99.6 percent of all the light hitting it. “When we were trying to do some experiments with, you know, light and laser beams,” said one of the inventors, “We couldn’t find the beam for a while because [the hell-of black disc] is absorbing so much.”
Guest nunu contributor Ryan Saylor talked to Dr. Jessica Thomas, an editor at the monthly research journal Nature Nanotechnology, about just how black the future looks for fashion.
the nunu: What are the implications for using this substance as a garment?
Dr: Thomas: This is just a guess here, but I think that one limitation would be how flexible one could make these materials. The authors of the study grew carbon nanotubes, which are cylinders of a single layer of carbon (one atom thick), on a flat substrate. I have seen such things before and they look like a furry, black carpet (it might remind you of the soft side of a Velcro snap). They didn’t say in the paper what this substrate was – likely some sort of metal or semiconductor. I don’t know that it would be so practical to grow these nanotubes on a large scale surface; rather, you could maybe have to ‘plate’ together a bunch of these miniature substrates. By the way, the touted applications at the end of this article are solar cells and detectors.
Yeah, those will be awesome probably. So, can we make nano-thin, nano-black tops/stockings?
The nanotubes are only about 10 nanometers in diameter [Ed. note: very small], but they are almost 1 millimeter long. I gathered from the paper that the thickness is important here because light gets trapped in the thick carbon nanotube carpet. I have never measured the thickness of my stockings, but I am pretty sure they are much less than a mm thick!


