30 Jan '13, 10pm

Carbon Nanotube Radiometer Moves Towards ‘NIST-on-a-Chip’: Light-hungry nanotube bundles mean faster, cheaper, m...

Carbon Nanotube Radiometer Moves Towards ‘NIST-on-a-Chip’: Light-hungry nanotube bundles mean faster, cheaper, m...

What is the blackest black this side of a black hole? So far, the earthly title goes to carbon nanotubes packed together on end. Mats of these vertically aligned multiwall carbon nanotube arrays (VANTAs) reflect less than 0.07 percent of incoming visible light (wavelengths 390 to 700 nanometers) and about 0.35 percent of radiation in the 5000-to-10 000 nm range. Imagine sifting sand over a field of up-ended drainpipes: almost nothing will bounce out. Researchers at the U.S. National Institute of Standards and Technology’s Boulder, CO, lab have exploited VANTAs’ near-perfect absorption to demonstrate a faster, cheaper, and more sensitive cryogenic radiometer—the workhorse instrument for calibrating radiation sources, including the lasers that drive fiber-optic communications. In Optics Letters , Nathan Tomlin and laser radiometry project leader John Lehman describe their si...

Full article: http://spectrum.ieee.org/tech-talk/at-work/test-and-measu...

Tweets

Apple moves towards greener Chinese supply chai...

greenbiz.com 31 Jan '13, 1pm

In addition to an updated report card on the environmental performance of various IT brands, the report describes in detai...

New poll: U.S. voters favor carbon tax by 4-to-...

foe.org 30 Jan '13, 8pm

U.S. voters favor carbon tax by 4-to-1 margin Posted Jan. 30, 2013 / Posted by: Michelle Chan Cutting social spending not ...

US Elections Behind, A123 Sale Moves Ahead

renewableenergyworld.com 30 Jan '13, 4pm

After a stormy 2012 that saw growing trade friction between China and the US, I'm happy to see that 2013 is getting off to...

LowCVP names its Low Carbon Champions at annual awards: As the organisation celebrates 10 years of promoting low...

LowCVP names its Low Carbon Champions at annual...

thegreencarwebsite.co.uk 30 Jan '13, 11am

As the organisation celebrates 10 years of promoting low carbon transport, the LowCVP gave out its annual Low Carbon Champ...