Laser light purifies nanotube mix
As-grown single-walled carbon nanotubes (SWNTS) consist of a mixture of both metallic and semiconducting tubes. This is a problem for when it comes to making high-performance electronic devices because – ideally – pure samples of either semiconducting or metallic tubes are required, depending on the application. Now, a team in the US has come up with a new way to separate out the two types of tubes by irradiating the mixture with an IR laser beam of a particular wavelength. The technique produces pristine arrays of purely semiconducting SWNTs that could be used to fabricate high-quality electronics devices such as transistors…..
http://nanotechweb.org/cws/article/tech/59587
