A facile, solvent-free, noncovalent, and nondisruptive route to functionalize single-wall carbon nanotubes using tertiary phosphines

作者：Suri Anil; Chakraborty Amit K; Coleman Karl S^*

来源：Chemistry of Materials, 2008, 20(5): 1705-1709.

DOI：10.1021/cm071573e

A facile, solvent-free, low-level noncovalent method for the modification of single-wall carbon nanotubes (SWNTs) by tertiary phosphines is described. The modified SWNTS show greater ease of exfoliation into common organic solvents (Such as dichloromethane, dimethylformamide, ethanol, and 1,2-dichlorobenzene) than unmodified nanotubes which is important for enhanced processability. AFM analysis shows a significant debundling of the SWNTs upon phosphine treatment. Interestingly, Raman spectroscopy and absorption spectroscopy in the near-infrared region indicate that the disruption of the intrinsic electronic structure of the nanotubes upon modification is minimal. X-ray photoelectron spectroscopy (XPS) data obtained from the modified nanotubes suggest that the tertiary phosphines interact chemically, presumably via the lone pair of electrons on the phosphorus, with the "electron-deficient" nanotubes.

• 出版日期2008-3-11