Chemistry Nexus

by WebElements: the periodic table on the web

The U.S. Department of Energy’s Brookhaven National Laboratory reports that scientists at the US Brookhaven National Laboratory and the IBM T.J. Watson Research Center caused an individual carbon nanotube to emit light for the first time. This may have significance for many of the proposed applications for carbon nanotubes including in electronics and photonics.

The light emission is the result of a process called “electron-hole recombination.” By running an electric current through a carbon nanotube – a long, hollow cylindrical molecule that is only one and a half nanometers (a billionth of a meter) in diameter – negatively charged electrons in the nanotube molecule combine with positively charged “holes,” which are locations in the molecule where electrons are missing.

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December 13th, 2009

Posted In: Chemistry, Nanoscience and nanotechnology

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