INOR 621 |
| Microwave-assisted purification, chemical functionalization and dispersion of multi-walled carbon nanotubes (MWNTs) are reported. To prevent sidewall functionalization, removal of residual catalyst was carried out using weak, dilute acids and complexing agents. Further covalent derivatization by attaching hydrophilic groups to the sidewall improved aqueous dispersibility to reach 1 mg/ml in DI water and 0.5 mg/ml in ethanol. Oxidized MWNTs containing –COOH could be used for further functionalization, such as, amidation and platinum coating. The MWNTs were found to be less reactive and had lower solubility than the SWNTs. References: 1. “Rapidly functionalized and highly water-soluble carbon nanotubes”. Yubing Wang, Zafar Iqbal and Somenath Mitra. Journal of Am. Chem. Soc. 43 1015-1020, (2006). 2. “Microwave-induced rapid chemical functionalization of single-walled carbon nanotubes.” Yubing Wang, Zafar Iqbal and Somenath Mitra. Carbon, 43 1015-1020, (2005). |
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Nanoscience: Synthesis and Characterization
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |