Posted on 10/23/2015 10:43:58 AM PDT by Red Badger
Optical black body, the fabrication of which occurs via seeded growth of Au nanospheres from Au nanorods. a, Low-magnification TEM image of a realized sample. b, TEM image of a single nanostructure. c, HRTEM image near the kissing point between the nanosphere and the nanorod. Credit: (c) 2015 Nature Nanotechnology (2015) doi:10.1038/nnano.2015.228
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A team of researchers at King Abdulla University of Science and Technology in Saudi Arabia has made the blackest material ever created by us human beings. As they note in their paper published in Nature Nanotechnology, the idea for how to create the material came, from of all sources, an all white cyphochilus beetle.
As the researches also note, it is likely impossible to create the perfect black material, one that absorbs all of the energy that strikes it, and then emits it without any lose of energy. Still scientists would like to come closer because it is believed such materials could help in creating better or more efficient devices, such as solar collectors.
In this new effort, the team bested the blackness of previous materials made using carbon nanotubes by emulating what they found when studying the all white cyphochilus beetle. The result was a an extremely tiny nanoparticle rod resting on an equally tiny nanoparticle sphere (30 nm diameter) which was able to absorb approximately 98 to 99 percent of the light in the spectrum between 400 and 1,400nm, which meant it was able to absorb approximately 26 percent more light than any other known material—and it does so from all angles and polarizations.
The researchers noted that the scales on the cyphochilus beetle—a photonic crystal structure—caused the beetle's shell to reflect light very efficiently. They took that idea and turned it on its head by inverting the structure and used the idea of chaotic energy harvesting to create the extremely black material—the surface of the structure is disordered, which creates a pattern of random pits, each consisting of infinitely long metallic waveguides. As an added bonus, the material can be easily created and applied and used both in and out of liquids. Also, by firing a laser at it, they created a new type of light source which generated monochromatic emissions without the necessity of resonance.
Devices using such an application might be used for desalination projects, the team notes, and of course in solar energy collecting systems, and perhaps in optical interconnects. They also suggest the material might even lead to using a wholly new approach in the design of such devices.
Explore further: Researchers create new nanostructure that absorbs broad spectrum of light from all angles
More information: Jianfeng Huang et al. Harnessing structural darkness in the visible and infrared wavelengths for a new source of light, Nature Nanotechnology (2015). DOI: 10.1038/nnano.2015.228
Abstract Engineering broadband light absorbers is crucial to many applications, including energy-harvesting devices and optical interconnects. The performances of an ideal absorber are that of a black body, a dark material that absorbs radiation at all angles and polarizations. Despite advances in micrometre-thick films, the absorbers available to date are still far from an ideal black body. Here, we describe a disordered nanostructured material that shows an almost ideal black-body absorption of 98–99% between 400 and 1,400 nm that is insensitive to the angle and polarization of the incident light. The material comprises nanoparticles composed of a nanorod with a nanosphere of 30 nm diameter attached. When diluted into liquids, a small concentration of nanoparticles absorbs on average 26% more than carbon nanotubes, the darkest material available to date. By pumping a dye optical amplifier with nanosecond pulses of ∼100 mW power, we harness the structural darkness of the material and create a new type of light source, which generates monochromatic emission (∼5 nm wide) without the need for any resonance. This is achieved through the dynamics of light condensation in which all absorbed electromagnetic energy spontaneously generates single-colour energy pulses.
Journal reference: Nature Nanotechnology
What you did there............I SEE IT.........
This is one of the best memes.
Depending on the FR mod, it gets pulled if posted.
https://i.imgur.com/xV3slh.jpg
And here come the ex-wife/husband/gf/bf/MIL jokes about their heart/soul.
Butthole Lane there is a barber showing photographs of every groundhog he's had the pleasure to have known, The people they come and go, just to say Hello
I thought the blackest substance on earth was found in the heart of a muslim????
Hey guys, what if we fire a laser at it?
Yeah! Joe, get the laser.
Space Rednecks in the 22 century
Black Material Matters!
Hmmmm. Au = aurum, which is Latin for Gold!!!! Reminds me of the time I worked at Halliburton and they sent some parts out for Au aurum brazing. Nowhere did it mention “Gold”. When they were returned we had to have an armed guard deliver them to stock.
Hey cats, I was black before black was cool.
Except that it's been deemonstrated that she has no heart...
Of course none of the authors is actually a Saudi or even *any* Arab. Not even a token goat f***er on the list. No surprise there, then. The name of the university is a joke in itself.
Those wacky English! They tried to honor Chuck Norris by naming a street after him, but they’re all dead now: the committee, all the neighbors and adjoining residents, everyone within several miles ....
No one crosses Chuck Norris and lives.
So they named it `Scratchy Bottom Road’ instead.
Understand “clock boy” has been offered a professorship on the faculty. And why not? A brilliant invention such as that. It’s right up there with “The Think System” for learning to read and play music, invented by Professor Harold Hill, Gary, Indiana, Class of ought-five.
The new box of Crayolas will list it as “Heart of Obama Black”
Yes, but there seems to be a shortage of those on EARTH.......................
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