my.chemeurope.com
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
03-21-2005: North Carolina scientists have found that "thinnest" is not necessarily "best" in rating structure and function of carbon nanotubes, the molecule-sized cylinders that show promise for futuristic technology scaled at a billionths of a meter. Researchers at Duke University and Xintek, Inc. synthesized and tested a new class of nanotubes made up of two to five layers of carbon atoms.
The scientists find these "few-walled" carbon nanotubes are structurally nearly as perfect as one carbon atom thick "single-walled" carbon nanotubes, while being cheaper to make than their single-walled cousins, said Duke assistant chemistry professor Jie Liu. Liu and his colleagues discovered how to create the tubes within heated streams of alcohol and hydrogen.
Moreover, tests by Liu's collaborators at Xintek found that few-walled nanotubes can be made to spew out electrons with better performance than current commercial carbon nanotubes, Liu added.
Xintek is already commercializing varieties of carbon nanotubes as "field emitters" that generate electrons to empower portable and miniaturized X-ray sources. Other possible uses for electron field emitters would include-flat panel displays and new kinds of light sources.
Watchlist
This is where you can add this news to your personal favourites
Smaller is better in the viscous zone
Being the right size and existing in the limbo between a solid and a liquid state appear to be the secrets to improving the efficiency of chemical catalysts that can create better nanoparticles or more efficient energy sources. When matter is in this transitional state, a catalyst can achi ... more
Stretched polymer snaps back smaller than it started
Crazy bands are cool because no matter how long they've been stretched around a kid's wrist, they always return to their original shape, be it a lion or a kangaroo. Now a Duke and Stanford chemistry team has found a polymer molecule that's so springy it snaps back from stretching much small ... more
Why mercury is more dangerous in oceans
Even though freshwater concentrations of mercury are far greater than those found in seawater, it's the saltwater fish like tuna, mackerel and shark that end up posing a more serious health threat to humans who eat them. The answer, according to Duke University researchers, is in the seawa ... more
UNC scientists develop promising new X-ray device using carbon nanotubes
Scientists at the University of North Carolina at Chapel Hill and a UNC start-up company, Xintek, Inc., have invented a new X-ray device based on carbon nanotubes that emits a scanning X-ray beam composed of multiple smaller beams while also remaining stationary. As a result, the device can ... more
'Few-Walled' Carbon Nanotubes Said Cheap and Efficient Option for Certain Applications
North Carolina scientists have found that "thinnest" is not necessarily "best" in rating structure and function of carbon nanotubes, the molecule-sized cylinders that show promise for futuristic technology scaled at a billionths of a meter. Researchers at Duke University and Xintek, Inc. sy ... more
About CHEMIE.DE
CHEMIE.DE Information Service GmbH runs specialist scientific internet portals. The secret to our success? We are familiar with what we publish.
Advertising at CHEMIE.DE
Our advertising formats support you in getting your message across to a clearly defined target audience.
© 1997-2011 CHEMIE.DE Information Service GmbH, All rights reserved
