Large-Scale Separation of Metallic and Semiconducting\nSingle-Walled Carbon Nanotubes

Abstract

In the applications of single-walled carbon nanotubes (SWNTs), it is extremely important to\nseparate semiconducting and metallic SWNTs. Although several methods have been reported for the\nseparation, only low yields have been achieved at great expense. We show a separation method involving\na dispersion−centrifugation process in a tetrahydrofuran solution of amine, which makes metallic SWNTs\nhighly concentrated to 87% in a simple way.