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Scientists already planning range of space applications, from light suppression to heat and weight reduction
By
Daily Mail Reporter
Last updated at 5:33 PM on 10th November 2011
Nasa engineers have come up with a material that absorbs more than 99 per cent of all light that strikes it.
Absorbent material usually pulls in ultraviolet and visible light – but this new material also captures infrared and far infrared light.
The development has even taken fellow Nasa scientists by surprise, and it promises to open new frontiers in space technology.
The team of engineers at Nasa’s Goddard Space Flight Center in Greenbelt, Maryland, reported the findings recently at the SPIE Optics and Photonics conference.
Super black material: A close-up image (about 0.03 of an inch wide) of the new material. A section has been removed to show the vertical nanotubes
Electron microscope: an even closer view of the nanotube surface shows why some scientists refer to it as looking like shag-pile carpet
John Hagopian, leading the team, said reflectance tests were extremely positive, showing that the material has 50 times more absorbtion qualities than its rivals.
He said: ‘Though other researchers are reporting near-perfect absorption levels, mainly in the ultraviolet and visible, our material is darn near perfect across multiple wavelength bands – from the ultraviolet to the far infrared.
‘No one else has achieved this milestone yet.’
The material is a thin coating of carbon nanotubes – hollow and
multi-walled tubes about 10,000 times thinner than a strand of human
hair.
Practical use: The material could coat sections of light-sensitive equipment, such as the Hubble telescope
They stand at 90 degrees from the surface they coat, which Nasa scientists have referred to as looking like shag-pile carpet.
It can be applied to a variety of surfaces, including silicon, silicon nitride, titanium, and stainless steel – the materials
most commonly used in space science instruments.
Nasa is already thinking about practical applications for the material – the most obvious being as light-suppression on sensitive equipment.
The tiny gaps between the tubes
collect and trap background light to prevent it from reflecting off
surfaces and interfering with the light that scientists actually want to
measure.
Because only
a small fraction of light reflects off the coating, the human eye and
sensitive detectors see the material as black.
The material could dramatically slash light reflected off deep space equipment that is already straining to detect the faintest and farthest light sources.
Less obvious, however, is the fact that the material could also be used as a coolant.
The blacker the material, the more heat it radiates away, so the coating could be used on devices that remove heat from instruments and radiate it
away to deep space.
Finally, it is a lot lighter than other materials that off less absorbtion – and weight is a critical factor in any payload being sent into space.
Goddard engineer Manuel Quijada, who co-authored the SPIE paper and carried out the reflectance tests, said: ‘We are a little surprised by the results’.
He added: ‘We knew it was absorbent. We just didn’t think it would be this absorbent from the ultraviolet to the far infrared.’
Goddard scientist Ed Wollack summed it up by saying: ‘This is a very promising material. It’s robust, lightweight, and extremely black. It is better than black paint by a long shot.’
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This can have great applications to remove light pollution from space based telescopes like hubble, making a clearer picture i bet of distant planets like 51pegasus. Great times
- Phil, Gosport, 11/11/2011 01:11
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This is really evil. I will have my revenge because it failed to finish me off.
- Light, Universe., 11/11/2011 00:45
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I can turn invisible… but only when no one’s looking.
- Bob, London, England, 10/11/2011 22:27
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You have to remember this is still in the experimental stage.until it’s proved whiter than white we’ll just have to take NASA’s word for it..
- Brains, Tracy Island, 10/11/2011 22:18
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Make it into blinds quick as the kids’ ones still let the light creep around the edges
- cheery, wrexham, 10/11/2011 21:20
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How much more black could this be? And the answer is none. None more black.
- Martin, Denver, USA, 10/11/2011 21:17
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Article source: http://www.dailymail.co.uk/sciencetech/article-2059986/Nasa-goes-dark-inventing-material-absorbs-light.html?ito=feeds-newsxml
Tags:
hubble telescope,
new frontiers,
goddard space flight,
carbon nanotubes,
wavelength bands,
sensitive equipment,
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