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Synthesis and Characterization of Water Soluble Single-Walled Carbon Nanotube Graft Copolymers

2005; American Chemical Society; Volume: 127; Issue: 22 Linguagem: Inglês

10.1021/ja042924i

1943-2984

Bin Zhao, Hui Hu, Aiping Yu, Daniel E. Perea, Robert C. Haddon,

Supercapacitor Materials and Fabrication

Poly(aminobenzene sulfonic acid) (PABS) and polyethylene glycol (PEG) were covalently attached to single-walled carbon nanotubes (SWNTs) to form water-soluble graft copolymers. Quantitative near-IR (NIR) spectroscopic studies of these SWNT graft copolymers indicate a water solubility of about 5 mg/mL, and atomic force microscopy studies show a fairly uniform length and diameter. On the basis of thermogravimetric analysis, the loading of SWNTs in the graft copolymers is estimated to be 30% for SWNT−PABS and 71% for SWNT−PEG. NIR spectroscopic studies of SWNT−PABS show that this graft copolymer has a ground state that is a hybrid of the electronic structures of the isolated PABS and SWNT macromolecules.