A Facile, Low-cost, And Scalable Method Of Selective Etching Of Semiconducting Single-walled Carbon Nanotubes By A Gas Reaction

摘要

Single-walled carbon nanotubes (SWNTs) are one of the most promising materials for future electronics. However, they are generally grown as a mixture of metallic and semiconducting tubes, which is a major obstacle to their widespread application. Recently, several approaches for the enrichment of SWNTs with one electronic type have been developed, such as selective elimination of metallic SWNTs (M-SWNTs) by electrical breakdown or methane plasma etching, selective adsorption, electrophoresis, and density-gradient centrifugation. In these reported methods, however, either the amount of the separated samples is quite small, or long-time or ultrahigh-speed centrifugation are needed in order to achieve good results.