Brighter Nanotubes
Light-emitting carbon nanotubes could find uses in telecommunications, lighting, and high-performance computers. Carbon nanotubes are renowned for their strength, small diameter, and stunning electronic properties. They may be a key element in memory and processing chips of the future. Now researchers have made carbon nanotube devices with another highly promising quality: the ability to emit light. In the past, light-emitting carbon nanotubes were very inefficient at converting electrons into photons — so inefficient that finding applications for them seemed a distant possibility. But in recent findings, announced last week in Science, IBM researchers fabricated nanotube devices that were around 1,000 times more efficient than previous ones at emitting light.
Site – http://www.technologyreview.com
Nanopillars Reverse Optical Behaviour
Scientists in the UK and Russia have succeeded in fabricating a material that has a negative permeability at visible wavelengths. The development is important because it could lead to so-called “left-handed? materials which exhibit a negative refractive index and function as a perfect lens.
Site – http://www.nanotechweb.org
