As-made single-walled carbon nanotubes consist of a mixture of both metallic and semiconducting nanotubes. This is a problem for researchers trying to fabricate 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 using nanoscale thermocapillary physics. The purified arrays could be used to make high-performance electronics devices such as transistors……

http://nanotechweb.org/cws/article/tech/53369