Synthesis and characterization of water soluble single-walled carbon nanotube graft copolymers.
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.
Zhao
Bin
B
Center for Nanoscale Science and Engineering, Department of Chemistry, University of California, Riverside, California 92521-0403, USA.
Hu
Hui
H
Yu
Aiping
A
Perea
Daniel
D
Haddon
Robert C
RC
D001557:Benzenesulfonates / Q000138:chemical synthesis / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000138:chemical synthesis / Q000737:chemistry*; D012995:Solubility; D019265:Spectroscopy, Near-Infrared; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry
D001557:Benzenesulfonates; D037742:Nanotubes, Carbon; D014867:Water; D011092:Polyethylene Glycols