A Simple Method of Separating Metallic and Semiconducting Single-Walled Carbon Nanotubes Based on Molecular Charge Transfer

摘要

Single-walled carbon nanotubes (SWNTs) exhibit fascinating electronic, thermal, and mechanical properties with several possible applications. They can be semiconducting, semimetallic, or metallic depending on the geometrical structure. Metallic SWNTs can function as conductive additives and as leads in nanoscale circuits, while the semiconducting ones can be used to design field effect transistors. As-grown SWNTs are typically mixtures of metallic and semiconducting nanotubes, which limit their applicability. There have been several attempts to separate semiconducting and metallic nanotubes.