| 摘要 |
A method is described to bulk separate single wall nanotubes (SWNTs) by type ( metallic (met-) from semiconducting (sem-) and diameter. The separation is based on selective precipitation of either sem-SWNTs or met-SWNTs from a population of functionalized SWNTs. Surfactant N-alkyl-amines, for example, preferentially solubilize sem-SWNTs and precipitate met-SWNTs, while non-surfactant amines to selectively precipitate sem-SWNTs, leaving the met-SWNT fraction in suspension. In addition, the selective precipitation method can be used to separate enriched populations of sem-SWNTs or met-SWNTs by diameter. |
