A Facile, Solvent-Free, Noncovalent, and Nondisruptive Route To Functionalize Single-Wall Carbon Nanotubes Using Tertiary Phosphines

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• 作者：Anil Suri ; Amit K. Chakraborty ; Karl S. Coleman
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：March 11, 2008
• 年：2008
• 卷：20
• 期：5
• 页码：1705 - 1709
• 全文大小：955K
• 年卷期：v.20,no.5(March 11, 2008)
• ISSN：1520-5002

文摘

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.