Aqueous suspension of carbon nanotubes via non-covalent functionalization with oligothiophene-terminated poly(ethylene glycol)

Jea Uk Lee, June Huh, Keon Hyeong Kim, Cheolmin Park, Won Ho Jo

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A new polymeric amphiphilic molecule for dispersing carbon nanotubes (CNTs) in water, oligothiophene-terminated poly(ethylene glycol) (TN-PEG), was synthesized and its ability to stabilize aqueous CNT dispersions was examined by UV-Vis spectroscopy and transmission electron microscopy. It was observed that the TN-PEGs were strongly adsorbed onto the nanotube surface via a strong π-π interaction, and thus only gentle sonication causes exfoliation of CNT ropes and bundles into well-separated individual objects and small bundles comprising 2-10 tubes. The dispersion ability of the TN-PEGs and the long-term stability of their resulting dispersions were much better than commercial surfactants.

Original languageEnglish
Pages (from-to)1051-1057
Number of pages7
Issue number5
Publication statusPublished - 2007 Apr 1


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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